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<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<title>Mindwave Emacs</title>
<meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"/>
<meta name="title" content="Mindwave Emacs"/>
<meta name="generator" content="Org-mode"/>
<meta name="generated" content="2012-08-04 15:16:36 MDT"/>
<meta name="author" content="Jonathan Arkell"/>
<meta name="description" content=""/>
<meta name="keywords" content=""/>
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<body>
<div id="preamble">
</div>
<div id="content">
<h1 class="title">Mindwave Emacs</h1>
<div id="table-of-contents">
<h2>Table of Contents</h2>
<div id="text-table-of-contents">
<ul>
<li><a href="#sec-1">1 Interface Mindwave with emacs</a></li>
<li><a href="#sec-2">2 Output Examples</a></li>
<li><a href="#sec-3">3 Usage Examples</a>
<ul>
<li><a href="#sec-3-1">3.1 Basic testing code</a></li>
<li><a href="#sec-3-2">3.2 Example one: gather data into an org buffer</a>
<ul>
<li><a href="#sec-3-2-1">3.2.1 Set up the bacis and get a file for writing ready</a></li>
<li><a href="#sec-3-2-2">3.2.2 Marks</a></li>
<li><a href="#sec-3-2-3">3.2.3 Data collection</a></li>
<li><a href="#sec-3-2-4">3.2.4 Results Table</a></li>
<li><a href="#sec-3-2-5">3.2.5 Window for mark input</a></li>
<li><a href="#sec-3-2-6">3.2.6 Timed Recordings</a></li>
</ul>
</li>
<li><a href="#sec-3-3">3.3 Example two: solarized mind</a>
<ul>
<li><a href="#sec-3-3-1">3.3.1 Set up Hooks</a></li>
<li><a href="#sec-3-3-2">3.3.2 User-interface</a></li>
<li><a href="#sec-3-3-3">3.3.3 Medi-Curosr</a></li>
<li><a href="#sec-3-3-4">3.3.4 Solarized Mind</a></li>
</ul></li>
</ul>
</li>
<li><a href="#sec-4">4 The code</a>
<ul>
<li><a href="#sec-4-1">4.1 Basic House keeping</a></li>
<li><a href="#sec-4-2">4.2 Set Up the client</a>
<ul>
<li><a href="#sec-4-2-1">4.2.1 Basic constants</a></li>
<li><a href="#sec-4-2-2">4.2.2 Connection</a></li>
</ul>
</li>
<li><a href="#sec-4-3">4.3 Sending Data</a></li>
<li><a href="#sec-4-4">4.4 Recieving Data</a></li>
<li><a href="#sec-4-5">4.5 The hooks</a>
<ul>
<li><a href="#sec-4-5-1">4.5.1 Low level details for the hooks</a></li>
</ul>
</li>
<li><a href="#sec-4-6">4.6 Ask for authorisation</a></li>
<li><a href="#sec-4-7">4.7 Configure</a>
<ul>
<li><a href="#sec-4-7-1">4.7.1 Ask for raw output</a></li>
</ul></li>
</ul>
</li>
<li><a href="#sec-5">5 The End</a></li>
</ul>
</div>
</div>
<div id="outline-container-1" class="outline-2">
<h2 id="sec-1"><span class="section-number-2">1</span> Interface Mindwave with emacs</h2>
<div class="outline-text-2" id="text-1">
<pre class="example">;;; mindwave-emacs.el --- Neurosky mindwave support
;; Copyright (C) 2012 Jonathan Arkell
;; Author: Jonathan Arkell <[email protected]>
;; Created: 16 June 2012
;; Keywords: comint mindwave
;; This file is not part of GNU Emacs.
;; Released under the GPL
;;; Commentary:
;; Please see the org-file that this was generated from.
</pre>
<p>
mindwave-emacs is a chunk of elisp code that uses the
ThinkGearConnector program to pass off mindwave data directly to
emacs.
</p>
</div>
</div>
<div id="outline-container-2" class="outline-2">
<h2 id="sec-2"><span class="section-number-2">2</span> Output Examples</h2>
<div class="outline-text-2" id="text-2">
<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<caption></caption>
<colgroup><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="left" />
</colgroup>
<thead>
<tr><th scope="col" class="right">time</th><th scope="col" class="right">signal</th><th scope="col" class="right">highGamma</th><th scope="col" class="right">lowGamma</th><th scope="col" class="right">highBeta</th><th scope="col" class="right">lowBeta</th><th scope="col" class="right">highAlpha</th><th scope="col" class="right">lowAlpha</th><th scope="col" class="right">theta</th><th scope="col" class="right">delta</th><th scope="col" class="right">meditation</th><th scope="col" class="right">attention</th><th scope="col" class="left">mark</th></tr>
</thead>
<tbody>
<tr><td class="right">1340229522</td><td class="right">0</td><td class="right">6715</td><td class="right">8839</td><td class="right">7397</td><td class="right">12358</td><td class="right">9428</td><td class="right">19939</td><td class="right">21762</td><td class="right">45012</td><td class="right">83</td><td class="right">40</td><td class="left"></td></tr>
<tr><td class="right">1340229523</td><td class="right">0</td><td class="right">5293</td><td class="right">7680</td><td class="right">21524</td><td class="right">6436</td><td class="right">7380</td><td class="right">36453</td><td class="right">31707</td><td class="right">61168</td><td class="right">83</td><td class="right">61</td><td class="left"></td></tr>
<tr><td class="right">1340229524</td><td class="right">0</td><td class="right">2659</td><td class="right">11910</td><td class="right">8315</td><td class="right">3606</td><td class="right">4350</td><td class="right">12728</td><td class="right">6604</td><td class="right">20185</td><td class="right">78</td><td class="right">69</td><td class="left"></td></tr>
<tr><td class="right">1340229525</td><td class="right">0</td><td class="right">42703</td><td class="right">39375</td><td class="right">36054</td><td class="right">133924</td><td class="right">211462</td><td class="right">100667</td><td class="right">576943</td><td class="right">644892</td><td class="right">53</td><td class="right">74</td><td class="left"></td></tr>
<tr><td class="right">1340229526</td><td class="right">0</td><td class="right">13471</td><td class="right">7929</td><td class="right">14365</td><td class="right">62578</td><td class="right">20617</td><td class="right">4383</td><td class="right">256884</td><td class="right">906958</td><td class="right">44</td><td class="right">51</td><td class="left"></td></tr>
<tr><td class="right">1340229527</td><td class="right">0</td><td class="right">2271</td><td class="right">6518</td><td class="right">6288</td><td class="right">13430</td><td class="right">28688</td><td class="right">8927</td><td class="right">90855</td><td class="right">1118085</td><td class="right">29</td><td class="right">44</td><td class="left"></td></tr>
<tr><td class="right">1340229528</td><td class="right">0</td><td class="right">4299</td><td class="right">5690</td><td class="right">6973</td><td class="right">7985</td><td class="right">8977</td><td class="right">15999</td><td class="right">69443</td><td class="right">114812</td><td class="right">14</td><td class="right">34</td><td class="left"></td></tr>
<tr><td class="right">1340229529</td><td class="right">0</td><td class="right">2968</td><td class="right">6811</td><td class="right">6179</td><td class="right">8471</td><td class="right">8756</td><td class="right">4000</td><td class="right">55889</td><td class="right">74533</td><td class="right">21</td><td class="right">24</td><td class="left"></td></tr>
<tr><td class="right">1340229530</td><td class="right">0</td><td class="right">1704</td><td class="right">6543</td><td class="right">9922</td><td class="right">2012</td><td class="right">1750</td><td class="right">23099</td><td class="right">14680</td><td class="right">90702</td><td class="right">35</td><td class="right">50</td><td class="left"></td></tr>
<tr><td class="right">1340229531</td><td class="right">0</td><td class="right">2809</td><td class="right">2879</td><td class="right">6017</td><td class="right">15968</td><td class="right">7552</td><td class="right">9412</td><td class="right">5696</td><td class="right">71379</td><td class="right">50</td><td class="right">56</td><td class="left"></td></tr>
<tr><td class="right">1340229532</td><td class="right">0</td><td class="right">7705</td><td class="right">6187</td><td class="right">7244</td><td class="right">16578</td><td class="right">31379</td><td class="right">12079</td><td class="right">148379</td><td class="right">60969</td><td class="right">44</td><td class="right">54</td><td class="left"></td></tr>
<tr><td class="right">1340229533</td><td class="right">0</td><td class="right">5949</td><td class="right">8210</td><td class="right">8594</td><td class="right">6521</td><td class="right">13802</td><td class="right">30518</td><td class="right">39344</td><td class="right">25372</td><td class="right">47</td><td class="right">69</td><td class="left"></td></tr>
<tr><td class="right">1340229534</td><td class="right">0</td><td class="right">7649</td><td class="right">4027</td><td class="right">9078</td><td class="right">5012</td><td class="right">4273</td><td class="right">18162</td><td class="right">22758</td><td class="right">38168</td><td class="right">43</td><td class="right">63</td><td class="left"></td></tr>
<tr><td class="right">1340229535</td><td class="right">0</td><td class="right">1678</td><td class="right">2017</td><td class="right">3799</td><td class="right">6433</td><td class="right">3366</td><td class="right">4245</td><td class="right">29764</td><td class="right">5899</td><td class="right">35</td><td class="right">51</td><td class="left"></td></tr>
<tr><td class="right">1340229536</td><td class="right">0</td><td class="right">1189</td><td class="right">6646</td><td class="right">3084</td><td class="right">3522</td><td class="right">4005</td><td class="right">6985</td><td class="right">14239</td><td class="right">82198</td><td class="right">44</td><td class="right">57</td><td class="left"></td></tr>
<tr><td class="right">1340229537</td><td class="right">0</td><td class="right">2112</td><td class="right">9706</td><td class="right">33960</td><td class="right">14244</td><td class="right">26535</td><td class="right">16577</td><td class="right">23013</td><td class="right">21533</td><td class="right">60</td><td class="right">56</td><td class="left"></td></tr>
<tr><td class="right">1340229538</td><td class="right">0</td><td class="right">1905</td><td class="right">1391</td><td class="right">8818</td><td class="right">6341</td><td class="right">13640</td><td class="right">4823</td><td class="right">22706</td><td class="right">12155</td><td class="right">60</td><td class="right">54</td><td class="left">relaxed</td></tr>
<tr><td class="right">1340229539</td><td class="right">0</td><td class="right">1894</td><td class="right">8464</td><td class="right">9669</td><td class="right">4472</td><td class="right">5817</td><td class="right">10351</td><td class="right">12945</td><td class="right">2834</td><td class="right">70</td><td class="right">66</td><td class="left"></td></tr>
<tr><td class="right">1340229540</td><td class="right">0</td><td class="right">1597</td><td class="right">3099</td><td class="right">21082</td><td class="right">1943</td><td class="right">8788</td><td class="right">8036</td><td class="right">30336</td><td class="right">6669</td><td class="right">81</td><td class="right">61</td><td class="left"></td></tr>
<tr><td class="right">1340229541</td><td class="right">0</td><td class="right">1861</td><td class="right">5657</td><td class="right">13161</td><td class="right">5321</td><td class="right">12381</td><td class="right">2265</td><td class="right">15898</td><td class="right">11400</td><td class="right">81</td><td class="right">57</td><td class="left"></td></tr>
<tr><td class="right">1340229542</td><td class="right">0</td><td class="right">1538</td><td class="right">1899</td><td class="right">6201</td><td class="right">5171</td><td class="right">3724</td><td class="right">6658</td><td class="right">1750</td><td class="right">6385</td><td class="right">90</td><td class="right">63</td><td class="left"></td></tr>
<tr><td class="right">1340229543</td><td class="right">0</td><td class="right">1692</td><td class="right">3044</td><td class="right">5080</td><td class="right">5368</td><td class="right">5631</td><td class="right">1747</td><td class="right">7145</td><td class="right">3333</td><td class="right">90</td><td class="right">60</td><td class="left"></td></tr>
<tr><td class="right">1340229544</td><td class="right">0</td><td class="right">2217</td><td class="right">3062</td><td class="right">4332</td><td class="right">6559</td><td class="right">3085</td><td class="right">7375</td><td class="right">21089</td><td class="right">19816</td><td class="right">78</td><td class="right">60</td><td class="left"></td></tr>
<tr><td class="right">1340229546</td><td class="right">0</td><td class="right">2564</td><td class="right">2950</td><td class="right">3733</td><td class="right">7312</td><td class="right">5809</td><td class="right">18199</td><td class="right">5943</td><td class="right">10327</td><td class="right">57</td><td class="right">61</td><td class="left"></td></tr>
<tr><td class="right">1340229547</td><td class="right">0</td><td class="right">2400</td><td class="right">5140</td><td class="right">5839</td><td class="right">7216</td><td class="right">8070</td><td class="right">6510</td><td class="right">13131</td><td class="right">2961</td><td class="right">53</td><td class="right">64</td><td class="left"></td></tr>
<tr><td class="right">1340229548</td><td class="right">0</td><td class="right">1836</td><td class="right">1461</td><td class="right">10593</td><td class="right">1334</td><td class="right">21543</td><td class="right">5324</td><td class="right">43509</td><td class="right">71069</td><td class="right">53</td><td class="right">69</td><td class="left"></td></tr>
<tr><td class="right">1340229549</td><td class="right">0</td><td class="right">2358</td><td class="right">3557</td><td class="right">4657</td><td class="right">4135</td><td class="right">1947</td><td class="right">3002</td><td class="right">8021</td><td class="right">1432</td><td class="right">57</td><td class="right">67</td><td class="left"></td></tr>
<tr><td class="right">1340229550</td><td class="right">0</td><td class="right">1662</td><td class="right">1694</td><td class="right">3111</td><td class="right">3296</td><td class="right">2404</td><td class="right">7591</td><td class="right">5451</td><td class="right">6358</td><td class="right">63</td><td class="right">63</td><td class="left"></td></tr>
<tr><td class="right">1340229551</td><td class="right">0</td><td class="right">935</td><td class="right">3135</td><td class="right">8643</td><td class="right">5870</td><td class="right">6242</td><td class="right">2730</td><td class="right">6181</td><td class="right">1459</td><td class="right">70</td><td class="right">60</td><td class="left"></td></tr>
<tr><td class="right">1340229552</td><td class="right">0</td><td class="right">1835</td><td class="right">3510</td><td class="right">4576</td><td class="right">7218</td><td class="right">2036</td><td class="right">2749</td><td class="right">4368</td><td class="right">7480</td><td class="right">81</td><td class="right">54</td><td class="left"></td></tr>
<tr><td class="right">1340229553</td><td class="right">0</td><td class="right">1021</td><td class="right">3251</td><td class="right">5087</td><td class="right">5483</td><td class="right">2280</td><td class="right">6480</td><td class="right">11058</td><td class="right">16476</td><td class="right">78</td><td class="right">57</td><td class="left">another</td></tr>
<tr><td class="right">1340229554</td><td class="right">0</td><td class="right">2565</td><td class="right">1468</td><td class="right">10513</td><td class="right">12150</td><td class="right">21771</td><td class="right">16130</td><td class="right">21917</td><td class="right">17520</td><td class="right">78</td><td class="right">60</td><td class="left"></td></tr>
<tr><td class="right">1340229555</td><td class="right">0</td><td class="right">5049</td><td class="right">2925</td><td class="right">14554</td><td class="right">9252</td><td class="right">8270</td><td class="right">2454</td><td class="right">74591</td><td class="right">5747</td><td class="right">66</td><td class="right">44</td><td class="left"></td></tr>
<tr><td class="right">1340229556</td><td class="right">0</td><td class="right">2296</td><td class="right">2791</td><td class="right">2779</td><td class="right">2551</td><td class="right">1375</td><td class="right">2614</td><td class="right">29351</td><td class="right">40429</td><td class="right">50</td><td class="right">37</td><td class="left"></td></tr>
<tr><td class="right">1340229557</td><td class="right">0</td><td class="right">2762</td><td class="right">2659</td><td class="right">6519</td><td class="right">7152</td><td class="right">4360</td><td class="right">10126</td><td class="right">3559</td><td class="right">5185</td><td class="right">53</td><td class="right">43</td><td class="left"></td></tr>
<tr><td class="right">1340229558</td><td class="right">0</td><td class="right">2613</td><td class="right">1409</td><td class="right">4049</td><td class="right">2419</td><td class="right">4784</td><td class="right">3381</td><td class="right">4948</td><td class="right">10097</td><td class="right">57</td><td class="right">40</td><td class="left"></td></tr>
<tr><td class="right">1340229559</td><td class="right">0</td><td class="right">438</td><td class="right">1616</td><td class="right">1297</td><td class="right">4130</td><td class="right">2317</td><td class="right">6057</td><td class="right">12810</td><td class="right">184162</td><td class="right">50</td><td class="right">56</td><td class="left"></td></tr>
<tr><td class="right">1340229560</td><td class="right">0</td><td class="right">1976</td><td class="right">2660</td><td class="right">7300</td><td class="right">5489</td><td class="right">5101</td><td class="right">3020</td><td class="right">10564</td><td class="right">13617</td><td class="right">64</td><td class="right">67</td><td class="left"></td></tr>
<tr><td class="right">1340229561</td><td class="right">0</td><td class="right">3559</td><td class="right">4133</td><td class="right">6696</td><td class="right">5934</td><td class="right">2822</td><td class="right">23207</td><td class="right">8103</td><td class="right">15320</td><td class="right">57</td><td class="right">70</td><td class="left"></td></tr>
<tr><td class="right">1340229562</td><td class="right">0</td><td class="right">812</td><td class="right">3373</td><td class="right">3133</td><td class="right">7703</td><td class="right">17726</td><td class="right">6897</td><td class="right">54966</td><td class="right">143420</td><td class="right">40</td><td class="right">64</td><td class="left"></td></tr>
<tr><td class="right">1340229563</td><td class="right">0</td><td class="right">6667</td><td class="right">6829</td><td class="right">10165</td><td class="right">25519</td><td class="right">24609</td><td class="right">85072</td><td class="right">240138</td><td class="right">198194</td><td class="right">34</td><td class="right">61</td><td class="left"></td></tr>
<tr><td class="right">1340229564</td><td class="right">0</td><td class="right">2952</td><td class="right">8474</td><td class="right">20454</td><td class="right">8014</td><td class="right">8553</td><td class="right">32825</td><td class="right">154300</td><td class="right">936155</td><td class="right">20</td><td class="right">57</td><td class="left"></td></tr>
<tr><td class="right">1340229565</td><td class="right">0</td><td class="right">3875</td><td class="right">3082</td><td class="right">9643</td><td class="right">5095</td><td class="right">6947</td><td class="right">5616</td><td class="right">24947</td><td class="right">59565</td><td class="right">23</td><td class="right">44</td><td class="left"></td></tr>
<tr><td class="right">1340229566</td><td class="right">0</td><td class="right">6780</td><td class="right">8592</td><td class="right">9355</td><td class="right">1226</td><td class="right">27212</td><td class="right">6227</td><td class="right">18259</td><td class="right">70961</td><td class="right">37</td><td class="right">56</td><td class="left"></td></tr>
<tr><td class="right">1340229567</td><td class="right">0</td><td class="right">5022</td><td class="right">5286</td><td class="right">8248</td><td class="right">11726</td><td class="right">21470</td><td class="right">15820</td><td class="right">25245</td><td class="right">41331</td><td class="right">51</td><td class="right">63</td><td class="left"></td></tr>
</tbody>
</table>
<pre class="example">reset
set terminal png size 1024,800
set multiplot layout 7,1
unset title
set tmargin 0
set bmargin 0
set lmargin 8
set rmargin 2
set grid
set xtics format ""
set ylabel "EEG"
set ytics
set yrange [0 to 2000000]
plot data u 1:10 w lines title 'D' axis x1y1 lt rgb '#0000cc'
plot data u 1:9 w lines title 'T' axis x1y1 lt rgb '#0000ff'
set yrange [0 to 100000]
plot data u 1:8 w lines title '+A' lt rgb '#00ffff', data u 1:7 with lines title '-A' lt rgb '#0088ff'
plot data u 1:6 w lines title '+B' lt rgb '#00aa00', data u 1:5 with lines title '-B' lt rgb '#00ff00'
plot data u 1:4 w lines title '+G' lt rgb '#ff0000', data u 1:3 with lines title '-G' lt rgb '#ffaa00'
set xlabel "Time"
set yrange [0 to 100]
plot data u 1:11 lt rgb '#00cccc' w lines title 'eM' axis x1y1, \
data u 1:12 lt rgb '#ffcc00' w lines title 'eA' axis x1y1
unset multiplot
</pre>
<p>
<img src="example.png" alt="example.png" />
</p>
</div>
</div>
<div id="outline-container-3" class="outline-2">
<h2 id="sec-3"><span class="section-number-2">3</span> Usage Examples</h2>
<div class="outline-text-2" id="text-3">
</div>
<div id="outline-container-3-1" class="outline-3">
<h3 id="sec-3-1"><span class="section-number-3">3.1</span> Basic testing code</h3>
<div class="outline-text-3" id="text-3-1">
<p>
This is the test code that I have been using, just to make sure that I can actually connect to the mindwave and make it do stuff.
</p>
<pre class="example">(mindwave-get-buffer)
(mindwave-get-raw nil)
(mindwave-get-raw t)
(setq mindwave-hook nil)
(setq mindwave-raw-hook '())
(setq mindwave-blink-hook '())
(run-hook-with-args 'mindwave-blink-hook "foo")
(add-hook 'mindwave-hook 'mindwave-debug-standard)
(add-hook 'mindwave-raw-hook 'mindwave-debug-raw)
(add-hook 'mindwave-blink-hook 'mindwave-debug-blink)
(defun mindwave-debug-standard (o) (message "Standard output: %S" o))
(defun mindwave-debug-raw (o) (message "Raw: %S" o))
(defun mindwave-debug-blink (o) (message "Blink: %S" o))
</pre>
</div>
</div>
<div id="outline-container-3-2" class="outline-3">
<h3 id="sec-3-2"><span class="section-number-3">3.2</span> Example one: gather data into an org buffer</h3>
<div class="outline-text-3" id="text-3-2">
<p>
In this example, you can see how to use the base mindwave hooks to capture data into an org buffer. This actually is far more then a simple example, and is really a full working suite of tools that you can use to examine your neurological state.
</p>
<p>
However, I am not a neuroscientist, I am a computer programmer. If you happen to be a neuroscientist, psychologist or other scientist who can help out my process, I would LOVE to hear from you.
</p>
<pre class="example">;;; mindwave-emacs.el --- Neurosky mindwave support
o;; Copyright (C) 2012 Jonathan Arkell
;; Author: Jonathan Arkell <[email protected]>
;; Created: 16 June 2012
;; Keywords: comint mindwave
;; This file is not part of GNU Emacs.
;; Released under the GPL
(provide 'mindwave-emacs)
(require 'mindwave-emacs)
(defvar dg-mindwave/org-buffer "Brain.org")
(defvar dg-mindwave/mark nil)
(defun dg-mindwave/generic-mark ()
"Used to generically mark a section of the table"
(interactive)
(dg-mindwave/mark "mark"))
(defun dg-mindwave/mark (mark)
"Set a mark on the section of a table"
(interactive "sMark: ")
(setq dg-mindwave/mark mark))
(defun dg-mindwave/if-assoc (key lst)
(if (assoc key lst)
(number-to-string (cdr (assoc key lst)))
" "))
(defun dg-mindwave/get-in (lst key keylist)
(let ((innerList (assoc key lst)))
(mapconcat '(lambda (el)
(if (and innerList
(assoc el innerList))
(number-to-string (cdr (assoc el innerList)))
""))
keylist
" | ")))
(defun dg-mindwave/collect-and-write (output)
"Hook function to gather and write data to the table."
(let* ((out (json-read-from-string output))
(string-write (concat "| "
(format-time-string "%s")
" | "
(dg-mindwave/if-assoc 'poorSignalLevel out)
" | "
(dg-mindwave/get-in out 'eegPower '(highGamma lowGamma highBeta lowBeta highAlpha lowAlpha theta delta))
" | "
(dg-mindwave/get-in out 'eSense '(attention meditation))
" | "
(when dg-mindwave/mark
(let ((m dg-mindwave/mark))
(setq dg-mindwave/mark)
m))
" | "
"\n")))
(with-current-buffer dg-mindwave/org-buffer
(goto-char (point-max))
(insert string-write))))
(defun dg-mindwave/start-recording-session (name)
"Sets up an entirely new mindwave session for recording."
(interactive "sMindwave Session Name: ")
(with-current-buffer dg-mindwave/org-buffer
(goto-char (point-max))
(insert "\n\n")
(insert "*** ")
(insert (current-time-string))
(insert " ")
(insert name)
(insert "\n")
(insert "#+TBLNAME: ")
(insert name)
(insert "\n")
(insert "|------------+--------+-----------+----------+----------+---------+-----------+----------+--------+---------+------------+-----------+------|\n")
(insert "| time | signal | highGamma | lowGamma | highBeta | lowBeta | highAlpha | lowAlpha | theta | delta | meditation | attention | mark |\n")
(insert "|------------+--------+-----------+----------+----------+---------+-----------+----------+--------+---------+------------+-----------+------|\n"))
(mindwave-get-buffer)
(when (not (member 'dg-mindwave/collect-and-write 'mindwave-hook))
(add-hook 'mindwave-hook 'dg-mindwave/collect-and-write)))
(defun dg-mindwave/stop-recording-session ()
"Stops a recording session"
(interactive)
(remove-hook 'mindwave-hook 'dg-mindwave/collect-and-write)
)
(defun dg-mindwave/start-45-second-session (name)
"Start a 45 second session with appropriate marks. NAME should be a simple name."
(interactive "s45 Second Session Name:")
(dg-mindwave/start-recording-session name)
(run-at-time 15 nil '(lambda ()
(message "Close your Eyes and Relax")
(beep 1)
(dg-mindwave/mark "relaxed")))
(run-at-time 30 nil `(lambda ()
(message ,name)
(beep 1)
(dg-mindwave/mark ,name)))
(run-at-time 45 nil '(lambda ()
(beep 1)
(message "stop")
(dg-mindwave/stop-recording-session))))
</pre>
<p>
When you purchase a mindwave, it doesn't actually come with any long-termdata logging code, and while there is an open source tool to show your brainwaves on a graph, it again doesn't provide logging.
</p>
<p>
I wanted something simple that would provide that for me.
</p>
<p>
This chunk of code here illustrates how to use mindwave-emacs. It will collect the eSense, eegPower and signal level into a table, that could theoretically be further processed into R, and then even plotted with various programs.
</p>
</div>
<div id="outline-container-3-2-1" class="outline-4">
<h4 id="sec-3-2-1"><span class="section-number-4">3.2.1</span> Set up the bacis and get a file for writing ready</h4>
<div class="outline-text-4" id="text-3-2-1">
<ul>
<li id="sec-3-2-1-1"><span class="todo TODO">TODO</span> change the dependence on Brain.org to something that can be set with customize.<br/>
Note, that the code assumes that you want everything put in a buffer called <code>Brain.org</code>.
<pre class="example">
(require 'mindwave-emacs)
(defvar dg-mindwave/org-buffer "Brain.org")
</pre>
</li>
</ul>
</div>
</div>
<div id="outline-container-3-2-2" class="outline-4">
<h4 id="sec-3-2-2"><span class="section-number-4">3.2.2</span> Marks</h4>
<div class="outline-text-4" id="text-3-2-2">
<p>
The basic concept of this data gathering scheme is the concept of
'marks'. During the examination of brainwaves, there may be
external or internal stimulus that trigger a sensation which may
(or may not) trigger a change in brainwave state. that brainwave
state should then be stored on the table for later analysis.
</p>
<p>
Right now a very simple interface is defined and provided. One can
either insert a generic "mark" into the table, and insert a
prompted for mark. A little later we will create a buffer that
takes alpha characters as marks.
</p>
<dl>
<dt>dg-mindwave/generic-mark</dt><dd>Inserts a generic mark called "mark".
</dd>
<dt>dg-mindwave/mark</dt><dd>Prompt for a mark name, and mark it with
that mark.
</dd>
</dl>
<p>
Note, that the act of prompting for a mark name already skews the
results, right?
</p>
<pre class="example">(defvar dg-mindwave/mark nil)
(defun dg-mindwave/generic-mark ()
"Used to generically mark a section of the table"
(interactive)
(dg-mindwave/mark "mark"))
(defun dg-mindwave/mark (mark)
"Set a mark on the section of a table"
(interactive "sMark: ")
(setq dg-mindwave/mark mark))
</pre>
<ul>
<li id="sec-3-2-2-1"><span class="todo TODO">TODO</span> sk for a symbol, but confirt to string in dg-mindwave/mark<br/>
</li>
</ul>
<ul>
<li id="sec-3-2-2-2"><span class="todo TODO">TODO</span> figure out a much better interface for marks<br/>
<p>
Right now the current mark implementation is clunky at best. In
my ideal work I would like to have a way to receive these mark
inputs from the mindwave wearer in as unobtrusive a way as
possible.
</p>
</li>
</ul>
</div>
</div>
<div id="outline-container-3-2-3" class="outline-4">
<h4 id="sec-3-2-3"><span class="section-number-4">3.2.3</span> Data collection</h4>
<div class="outline-text-4" id="text-3-2-3">
<p>
This is where the magic happens. A hook is set up to read the
various values from the mindwave output, and then write them into
an org-mode table.
</p>
<pre class="example">(defun dg-mindwave/if-assoc (key lst)
(if (assoc key lst)
(number-to-string (cdr (assoc key lst)))
" "))
(defun dg-mindwave/get-in (lst key keylist)
(let ((innerList (assoc key lst)))
(mapconcat '(lambda (el)
(if (and innerList
(assoc el innerList))
(number-to-string (cdr (assoc el innerList)))
""))
keylist
" | ")))
(defun dg-mindwave/collect-and-write (output)
"Hook function to gather and write data to the table."
(let* ((out (json-read-from-string output))
(string-write (concat "| "
(format-time-string "%s")
" | "
(dg-mindwave/if-assoc 'poorSignalLevel out)
" | "
(dg-mindwave/get-in out 'eegPower '(highGamma lowGamma highBeta lowBeta highAlpha lowAlpha theta delta))
" | "
(dg-mindwave/get-in out 'eSense '(attention meditation))
" | "
(when dg-mindwave/mark
(let ((m dg-mindwave/mark))
(setq dg-mindwave/mark)
m))
" | "
"\n")))
(with-current-buffer dg-mindwave/org-buffer
(goto-char (point-max))
(insert string-write))))
(defun dg-mindwave/start-recording-session (name)
"Sets up an entirely new mindwave session for recording."
(interactive "sMindwave Session Name: ")
(with-current-buffer dg-mindwave/org-buffer
(goto-char (point-max))
(insert "\n\n")
(insert "*** ")
(insert (current-time-string))
(insert " ")
(insert name)
(insert "\n")
(insert "#+TBLNAME: ")
(insert name)
(insert "\n")
(insert "|------------+--------+-----------+----------+----------+---------+-----------+----------+--------+---------+------------+-----------+------|\n")
(insert "| time | signal | highGamma | lowGamma | highBeta | lowBeta | highAlpha | lowAlpha | theta | delta | meditation | attention | mark |\n")
(insert "|------------+--------+-----------+----------+----------+---------+-----------+----------+--------+---------+------------+-----------+------|\n"))
(mindwave-get-buffer)
(when (not (member 'dg-mindwave/collect-and-write 'mindwave-hook))
(add-hook 'mindwave-hook 'dg-mindwave/collect-and-write)))
(defun dg-mindwave/stop-recording-session ()
"Stops a recording session"
(interactive)
(remove-hook 'mindwave-hook 'dg-mindwave/collect-and-write)
)
</pre>
</div>
</div>
<div id="outline-container-3-2-4" class="outline-4">
<h4 id="sec-3-2-4"><span class="section-number-4">3.2.4</span> Results Table</h4>
<div class="outline-text-4" id="text-3-2-4">
<p>
In my simple explorations, I found it handy to have a secondary
table generated from the first that shows various simple
statistical qualities.
</p>
<p>
Again, I am not a scientist, but I do find these result tables to
be fairly informative. If you have any ideas on how to make them
better, let me know.
</p>
<p>
Note, that for now the code formatting, especially of the org-mode
calc table is kinda yucky and could be better.
</p>
<pre class="example">(defun dg-mindwave/make-results-table (name)
"Generate a results table for a mindwave session"
(interactive "sMindwave Session Name: ")
(insert "\n")
(insert "#+TBLNAME: ")
(insert name)
(insert "_results")
(insert "\n")
(insert " | | signal | highGamma | lowGamma | highBeta | lowBeta | highAlpha | lowAlpha | theta | delta | meditation | attention |") (insert "\n")
(insert " |---------+-------------+-----------+-----------+-----------+-----------+-----------+-----------+-----------+-----------+------------+-----------|") (insert "\n")
(insert " | vmean | | | | | | | | | | | |") (insert "\n")
(insert " | vmedian | | | | | | | | | | | |") (insert "\n")
(insert " | vmax | | | | | | | | | | | |") (insert "\n")
(insert " | vmin | | | | | | | | | | | |") (insert "\n")
(insert " | vsdev | | | | | | | | | | | |") (insert "\n")
(insert (concat " #+TBLFM: @2$2=vmean(remote(" name ",@II$2..@III$2))::@3$2=vmedian(remote(" name ",@II$2..@III$2))::@4$2=vmax(remote(" name ",@II$2..@III$2))::@5$2=vmin(remote(" name ",@II$2..@III$2))::@6$2=vsdev(remote(" name ",@II$2..@III$2))::@2$3=vmean(remote(" name ",@II$3..@III$3))::@3$3=vmedian(remote(" name ",@II$3..@III$3))::@4$3=vmax(remote(" name ",@II$3..@III$3))::@5$3=vmin(remote(" name ",@II$3..@III$3))::@6$3=vsdev(remote(" name ",@II$3..@III$3))::@2$4=vmean(remote(" name ",@II$4..@III$4))::@3$4=vmedian(remote(" name ",@II$4..@III$4))::@4$4=vmax(remote(" name ",@II$4..@III$4))::@5$4=vmin(remote(" name ",@II$4..@III$4))::@6$4=vsdev(remote(" name ",@II$4..@III$4))::@2$5=vmean(remote(" name ",@II$5..@III$5))::@3$5=vmedian(remote(" name ",@II$5..@III$5))::@4$5=vmax(remote(" name ",@II$5..@III$5))::@5$5=vmin(remote(" name ",@II$5..@III$5))::@6$5=vsdev(remote(" name ",@II$5..@III$5))::@2$6=vmean(remote(" name ",@II$6..@III$6))::@3$6=vmedian(remote(" name ",@II$6..@III$6))::@4$6=vmax(remote(" name ",@II$6..@III$6))::@5$6=vmin(remote(" name ",@II$6..@III$6))::@6$6=vsdev(remote(" name ",@II$6..@III$6))::@2$7=vmean(remote(" name ",@II$7..@III$7))::@3$7=vmedian(remote(" name ",@II$7..@III$7))::@4$7=vmax(remote(" name ",@II$7..@III$7))::@5$7=vmin(remote(" name ",@II$7..@III$7))::@6$7=vsdev(remote(" name ",@II$7..@III$7))::@2$8=vmean(remote(" name ",@II$8..@III$8))::@3$8=vmedian(remote(" name ",@II$8..@III$8))::@4$8=vmax(remote(" name ",@II$8..@III$8))::@5$8=vmin(remote(" name ",@II$8..@III$8))::@6$8=vsdev(remote(" name ",@II$8..@III$8))::@2$9=vmean(remote(" name ",@II$9..@III$9))::@3$9=vmedian(remote(" name ",@II$9..@III$9))::@4$9=vmax(remote(" name ",@II$9..@III$9))::@5$9=vmin(remote(" name ",@II$9..@III$9))::@6$9=vsdev(remote(" name ",@II$9..@III$9))::@2$10=vmean(remote(" name ",@II$10..@III$10))::@3$10=vmedian(remote(" name ",@II$10..@III$10))::@4$10=vmax(remote(" name ",@II$10..@III$10))::@5$10=vmin(remote(" name ",@II$10..@III$10))::@6$10=vsdev(remote(" name ",@II$10..@III$10))::@2$11=vmean(remote(" name ",@II$11..@III$11))::@3$11=vmedian(remote(" name ",@II$11..@III$11))::@4$11=vmax(remote(" name ",@II$11..@III$11))::@5$11=vmin(remote(" name ",@II$11..@III$11))::@6$11=vsdev(remote(" name ",@II$11..@III$11))::@2$12=vmean(remote(" name ",@II$12..@III$12))::@3$12=vmedian(remote(" name ",@II$12..@III$12))::@4$12=vmax(remote(" name ",@II$12..@III$12))::@5$12=vmin(remote(" name ",@II$12..@III$12))::@6$12=vsdev(remote(" name ",@II$12..@III$12))")))
</pre>
<ul>
<li id="sec-3-2-4-1">Results Example (basic)<br/>
<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<caption></caption>
<colgroup><col class="left" /><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="right" /><col class="right" />
</colgroup>
<thead>
<tr><th scope="col" class="left"></th><th scope="col" class="right">signal</th><th scope="col" class="right">highGamma</th><th scope="col" class="right">lowGamma</th><th scope="col" class="right">highBeta</th><th scope="col" class="right">lowBeta</th><th scope="col" class="right">highAlpha</th><th scope="col" class="right">lowAlpha</th><th scope="col" class="right">theta</th><th scope="col" class="right">delta</th><th scope="col" class="right">meditation</th><th scope="col" class="right">attention</th></tr>
</thead>
<tbody>
<tr><td class="left">vmean</td><td class="right">0.061611374</td><td class="right">12192.720</td><td class="right">15232.820</td><td class="right">19399.642</td><td class="right">15180.616</td><td class="right">17033.287</td><td class="right">22201.699</td><td class="right">76134.531</td><td class="right">270353.25</td><td class="right">53.241706</td><td class="right">53.424171</td></tr>
<tr><td class="left">vmedian</td><td class="right">0</td><td class="right">8132.5</td><td class="right">10014</td><td class="right">14247.5</td><td class="right">9695.5</td><td class="right">8411.5</td><td class="right">9076.5</td><td class="right">23773.5</td><td class="right">62936</td><td class="right">54</td><td class="right">56</td></tr>
<tr><td class="left">vmax</td><td class="right">26</td><td class="right">86970</td><td class="right">152111</td><td class="right">192200</td><td class="right">260706</td><td class="right">363667</td><td class="right">799014</td><td class="right">820033</td><td class="right">2920134</td><td class="right">100</td><td class="right">100</td></tr>
<tr><td class="left">vmin</td><td class="right">0</td><td class="right">303</td><td class="right">378</td><td class="right">638</td><td class="right">342</td><td class="right">436</td><td class="right">311</td><td class="right">2025</td><td class="right">300</td><td class="right">0</td><td class="right">0</td></tr>
<tr><td class="left">vsdev</td><td class="right">1.2656602</td><td class="right">12190.021</td><td class="right">15797.156</td><td class="right">17531.918</td><td class="right">20699.664</td><td class="right">29733.997</td><td class="right">51731.083</td><td class="right">124792.48</td><td class="right">449634.67</td><td class="right">22.641340</td><td class="right">17.949459</td></tr>
</tbody>
</table>
</li>
</ul>
<ul>
<li id="sec-3-2-4-1"><span class="todo TODO">TODO</span> fix formatting of the TBLFM line<br/>
</li>
</ul>
<ul>
<li id="sec-3-2-4-2"><span class="todo TODO">TODO</span> make the lisp function re-calc the table after insertion<br/>
</li>
</ul>
</div>
</div>
<div id="outline-container-3-2-5" class="outline-4">
<h4 id="sec-3-2-5"><span class="section-number-4">3.2.5</span> Window for mark input</h4>
<div class="outline-text-4" id="text-3-2-5">
<p>
The mark window is a very simple mark interface. It will allow
you to use the lower case letters a through z to insert that
letter as a mark, which can be used as a mnemonic for various
situations.
</p>
<p>
Right now the buffer is just blank, but I will be working on
improving it in the future.
</p>
<pre class="example">(defun dg-mindwave/create-input-buffer ()
"Create an input buffer so that marks can be handled"
(interactive)
(pop-to-buffer (get-buffer-create "*mindwave-input*") )
(local-set-key " " 'dg-mindwave/generic-mark)
(local-set-key "a" '(lambda () (interactive) (dg-mindwave/mark "a")))
(local-set-key "b" '(lambda () (interactive) (dg-mindwave/mark "b")))
(local-set-key "c" '(lambda () (interactive) (dg-mindwave/mark "c")))
(local-set-key "d" '(lambda () (interactive) (dg-mindwave/mark "d")))
(local-set-key "e" '(lambda () (interactive) (dg-mindwave/mark "e")))
(local-set-key "f" '(lambda () (interactive) (dg-mindwave/mark "f")))
(local-set-key "g" '(lambda () (interactive) (dg-mindwave/mark "g")))
(local-set-key "h" '(lambda () (interactive) (dg-mindwave/mark "h")))
(local-set-key "i" '(lambda () (interactive) (dg-mindwave/mark "i")))
(local-set-key "j" '(lambda () (interactive) (dg-mindwave/mark "j")))
(local-set-key "k" '(lambda () (interactive) (dg-mindwave/mark "k")))
(local-set-key "l" '(lambda () (interactive) (dg-mindwave/mark "l")))
(local-set-key "m" '(lambda () (interactive) (dg-mindwave/mark "m")))
(local-set-key "n" '(lambda () (interactive) (dg-mindwave/mark "n")))
(local-set-key "o" '(lambda () (interactive) (dg-mindwave/mark "o")))
(local-set-key "p" '(lambda () (interactive) (dg-mindwave/mark "p")))
(local-set-key "q" '(lambda () (interactive) (dg-mindwave/mark "q")))
(local-set-key "r" '(lambda () (interactive) (dg-mindwave/mark "r")))
(local-set-key "s" '(lambda () (interactive) (dg-mindwave/mark "s")))
(local-set-key "t" '(lambda () (interactive) (dg-mindwave/mark "t")))
(local-set-key "u" '(lambda () (interactive) (dg-mindwave/mark "u")))
(local-set-key "v" '(lambda () (interactive) (dg-mindwave/mark "v")))
(local-set-key "w" '(lambda () (interactive) (dg-mindwave/mark "w")))
(local-set-key "x" '(lambda () (interactive) (dg-mindwave/mark "x")))
(local-set-key "y" '(lambda () (interactive) (dg-mindwave/mark "y")))
(local-set-key "z" '(lambda () (interactive) (dg-mindwave/mark "z"))))
</pre>
<ul>
<li id="sec-3-2-5-1"><span class="todo TODO">TODO</span> Make the buffer keep a record of the marks used.<br/>
</li>
</ul>
<ul>
<li id="sec-3-2-5-2"><span class="todo TODO">TODO</span> have some kind of way to input inside the mark buffer the meaning of various marks<br/>
</li>
</ul>
<ul>
<li id="sec-3-2-5-3"><span class="todo TODO">TODO</span> In the mark buffer, the eeg and signal scores should be displayed.<br/>
</li>
</ul>
</div>
</div>
<div id="outline-container-3-2-6" class="outline-4">
<h4 id="sec-3-2-6"><span class="section-number-4">3.2.6</span> Timed Recordings</h4>
<div class="outline-text-4" id="text-3-2-6">
<p>
Timed recordings are for micro-experimentation of your EEG. The idea
is that you record EEG activity in 15 second chunks, which each chunk
being a different activity.
</p>
<ol>
<li>a 'whatever chunk', and is basically 15 seconds of "whatever is
going on right now".
</li>
<li>a 15 second chunk of eyes closed and relaxing
</li>
<li>a 15 second chunk of experimentation or calibration, for instance:
<ul>
<li>eyes closed and relaxing
</li>
<li>eyes opened and relaxing
</li>
<li>eyes closed and breathing deeply
</li>
<li>eyes open and doing complicated math problems.
</li>
</ul>
</li>
</ol>
<p>
This can be used for self experimentation. At the 15 second mark,
Emacs will beep at you and tell you to close your eyes. At the 30
second mark, it will beep at you and insert the name of the session as
a mark. finally, it will beep at the 45 second mark and stop the
recording session.
</p>
<pre class="example">(defun dg-mindwave/start-45-second-session (name)
"Start a 45 second session with appropriate marks. NAME should be a simple name."
(interactive "s45 Second Session Name:")
(dg-mindwave/start-recording-session name)
(run-at-time 15 nil '(lambda ()
(message "Close your Eyes and Relax")
(beep 1)
(dg-mindwave/mark "relaxed")))
(run-at-time 30 nil `(lambda ()
(message ,name)
(beep 1)
(dg-mindwave/mark ,name)))
(run-at-time 45 nil '(lambda ()
(beep 1)
(message "stop")
(dg-mindwave/stop-recording-session))))
</pre>
</div>
</div>
</div>
<div id="outline-container-3-3" class="outline-3">
<h3 id="sec-3-3"><span class="section-number-3">3.3</span> Example two: solarized mind</h3>
<div class="outline-text-3" id="text-3-3">
<pre class="example">;;; solarized-mind.el --- changes emacs interface according to brainstate
;; Copyright (C) 2012 Jonathan Arkell
;; Author: Jonathan Arkell <[email protected]>
;; Created: 16 June 2012
;; Keywords: comint mindwave
;; This file is not part of GNU Emacs.
;; Released under the GPL
(require 'mindwave-emacs)
(defconst solarized-mind/brain-ring-size 30)
(defvar solarized-mind/brain-ring (make-ring solarized-mind/brain-ring-size))
(defvar solarized-mind/ring-reset-counter 0)
(defun solarized-mind/mindwave-hook (vals)
"Set up hook to solarize your mind, and set up the medicursor."
(let ((brain (json-read-from-string vals)))
(when (and (assoc 'eSense brain)
(assoc 'poorSignalLevel brain)
(> 50
(cdr (assoc 'poorSignalLevel brain))))
(ring-insert solarized-mind/brain-ring
(cons (cdr (assoc 'meditation (assoc 'eSense brain)))
(cdr (assoc 'attention (assoc 'eSense brain)))))
(when (>= (ring-length solarized-mind/brain-ring)
solarized-mind/brain-ring-size)
(let ((new-ring (make-ring solarized-mind/brain-ring-size))
(collapsed-ring (reduce #'(lambda (pair total)
(cons (+ (car pair)
(car total))
(+ (cdr pair)
(cdr total))))
(ring-elements solarized-mind/brain-ring)
:initial-value (cons 0 0))))
(ring-insert new-ring
(cons (/ (car collapsed-ring)
solarized-mind/brain-ring-size)
(/ (cdr collapsed-ring)
solarized-mind/brain-ring-size)))
(solarized-mind/set-medicursor (car (ring-ref new-ring 0)))
(solarized-mind/set-background (cdr (ring-ref new-ring 0)))
(setq solarized-mind/brain-ring new-ring))))))
(defun solarized-mind/set-medicursor (med)
"Set the cursor to a value from the mindwave"
(setq blink-cursor-interval
(if ( = 0 med)
0.25
(+ 0.25
(/ med 100.0)))))
(require 'hexrgb)
(defun solarized-mind/set-background (att)
"Sets the background color"
(set-background-color (solarized-mind/attention-to-rgb att))
;(set-frame-parameter nil 'background-color (solarized-mind/attention-to-rgb att))
nil)
;(frame-parameter nil 'background-color)
(defun solarized-mind/attention-to-rgb (att)
"Takes an attention value (out of 100) and returns a color between #000000 and #002b36"
(let ((h (hexrgb-hue "#002b36"))
(s (hexrgb-saturation "#002b36"))
(v (hexrgb-value "#002b36")))
(hexrgb-hsv-to-hex h
s
(* v (/ att 100.0)))))
;(set-face-attribute 'default nil :background (solarized-mind/attention-to-rgb 0))
</pre>
<p>
Assuming you're using the solarized (dark) theme, lets say that you want the background color to change according to how attentive you are.
</p>
<dl>
<dt>Attention</dt><dd>Level of 'solarized purity of background color'. The more attention, the more blue the solarized background.
</dd>
<dt>Meditation</dt><dd>Cursor blink rate, from 0.25 (less meditative) to 1 (more)
</dd>
</dl>
</div>
<div id="outline-container-3-3-1" class="outline-4">
<h4 id="sec-3-3-1"><span class="section-number-4">3.3.1</span> Set up Hooks</h4>
<div class="outline-text-4" id="text-3-3-1">
<p>
We set up a ring that is used to store both the attention and the
meditation values. Every second we store the data from the eSense
and put it in the ring. Once the ring is full, we "collapse" the
ring, get the mean of those values, and stick them on the first
element of the list.
</p>
<p>
This provides a bit of continutity to the list. It makes me
wonder if there is a better way to handle it to provide more
continuity overall, or even, if that is desireable? Is it better
to have small local updates as to ones relaxation and attention
states, or is it better to have a global one?
</p>
<ul>
<li id="sec-3-3-1-1">Digressions<br/>
<p>
One option is to store say 5-10 elements of history as part of