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003-minimal.html
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<!DOCTYPE html>
<html>
<head>
<style type="text/css">
.knitr.inline {
background-color: #f7f7f7;
border:solid 1px #B0B0B0;
}
.error {
font-weight: bold;
color: #FF0000;
},
.warning {
font-weight: bold;
}
.message {
font-style: italic;
}
.source, .output, .warning, .error, .message {
padding: 0em 1em;
border:solid 1px #F7F7F7;
}
.source {
background-color: #f5f5f5;
}
.rimage.left {
text-align: left;
}
.rimage.right {
text-align: right;
}
.rimage.center {
text-align: center;
}
.hl.num {
color: #AF0F91;
}
.hl.str {
color: #317ECC;
}
.hl.com {
color: #AD95AF;
font-style: italic;
}
.hl.opt {
color: #000000;
}
.hl.std {
color: #585858;
}
.hl.kwa {
color: #295F94;
font-weight: bold;
}
.hl.kwb {
color: #B05A65;
}
.hl.kwc {
color: #55aa55;
}
.hl.kwd {
color: #BC5A65;
font-weight: bold;
}
</style>
<title>A minimal knitr example in HTML</title>
</head>
<body>
<div class="chunk" id="unnamed-chunk-1"><div class="rcode"><div class="source"><pre class="knitr r"><span class="hl std">opts_chunk</span><span class="hl opt">$</span><span class="hl kwd">set</span><span class="hl std">(</span><span class="hl kwc">fig.width</span> <span class="hl std">=</span> <span class="hl num">5</span><span class="hl std">,</span> <span class="hl kwc">fig.height</span> <span class="hl std">=</span> <span class="hl num">5</span><span class="hl std">)</span>
</pre></div>
</div></div>
<p>This is a minimal example which shows <strong>knitr</strong>
working with HTML
pages. See <a href="https://bitbucket.org/stat/knitr/downloads/003-minimal.html">here</a>
for the output and
<a href="https://github.com/yihui/knitr-examples/blob/master/003-minimal.Rhtml">here</a>
for the source.</p>
<p>Boring stuff as usual:</p>
<div class="chunk" id="unnamed-chunk-2"><div class="rcode"><div class="source"><pre class="knitr r"><span class="hl com">## a simple calculator</span>
<span class="hl num">1</span> <span class="hl opt">+</span> <span class="hl num">1</span>
</pre></div>
<div class="output"><pre class="knitr r">## [1] 2
</pre></div>
<div class="source"><pre class="knitr r"><span class="hl com">## boring random numbers</span>
<span class="hl kwd">set.seed</span><span class="hl std">(</span><span class="hl num">123</span><span class="hl std">)</span>
<span class="hl kwd">rnorm</span><span class="hl std">(</span><span class="hl num">5</span><span class="hl std">)</span>
</pre></div>
<div class="output"><pre class="knitr r">## [1] -0.56048 -0.23018 1.55871 0.07051 0.12929
</pre></div>
</div></div>
<p>We can also produce plots (centered by the
option <code>fig.align='center'</code>):</p>
<div class="chunk" id="html-cars-scatter"><div class="rcode"><div class="source"><pre class="knitr r"><span class="hl kwd">library</span><span class="hl std">(ggplot2)</span>
<span class="hl kwd">plot</span><span class="hl std">(mpg</span> <span class="hl opt">~</span> <span class="hl std">hp, mtcars)</span>
</pre></div>
</div><div class="rimage center"><img src="http://animation.r-forge.r-project.org/knitr-ex/figure/003-minimal-html-cars-scatter1.png" title="plot of chunk html-cars-scatter" alt="plot of chunk html-cars-scatter" class="plot" /></div><div class="rcode">
<div class="source"><pre class="knitr r"><span class="hl kwd">qplot</span><span class="hl std">(hp, mpg,</span> <span class="hl kwc">data</span> <span class="hl std">= mtcars)</span> <span class="hl opt">+</span> <span class="hl kwd">geom_smooth</span><span class="hl std">()</span>
</pre></div>
</div><div class="rimage center"><img src="http://animation.r-forge.r-project.org/knitr-ex/figure/003-minimal-html-cars-scatter2.png" title="plot of chunk html-cars-scatter" alt="plot of chunk html-cars-scatter" class="plot" /></div></div>
<p>Errors, messages and warnings can be put into <code>div</code>'s
with different <code>class</code>es:</p>
<div class="chunk" id="unnamed-chunk-3"><div class="rcode"><div class="source"><pre class="knitr r"><span class="hl kwd">sqrt</span><span class="hl std">(</span><span class="hl opt">-</span><span class="hl num">1</span><span class="hl std">)</span> <span class="hl com"># warning</span>
</pre></div>
<div class="warning"><pre class="knitr r">## Warning: NaNs produced
</pre></div>
<div class="output"><pre class="knitr r">## [1] NaN
</pre></div>
<div class="source"><pre class="knitr r"><span class="hl kwd">message</span><span class="hl std">(</span><span class="hl str">"knitr says hello to HTML!"</span><span class="hl std">)</span>
</pre></div>
<div class="message"><pre class="knitr r">## knitr says hello to HTML!
</pre></div>
<div class="source"><pre class="knitr r"><span class="hl num">1</span> <span class="hl opt">+</span> <span class="hl str">"a"</span> <span class="hl com"># mission impossible</span>
</pre></div>
<div class="error"><pre class="knitr r">## Error: non-numeric argument to binary operator
</pre></div>
</div></div>
<p>In the end, let's show off a 3D plot from
the <strong>rgl</strong> package.</p>
<div class="chunk" id="unnamed-chunk-4"><div class="rcode"><div class="source"><pre class="knitr r"><span class="hl std">knit_hooks</span><span class="hl opt">$</span><span class="hl kwd">set</span><span class="hl std">(</span><span class="hl kwc">rgl</span> <span class="hl std">= hook_rgl)</span> <span class="hl com"># set up the hook first</span>
</pre></div>
</div></div>
<div class="chunk" id="fancy-rgl"><div class="rcode"><div class="source"><pre class="knitr r"><span class="hl kwa">if</span> <span class="hl std">(</span><span class="hl kwd">require</span><span class="hl std">(</span><span class="hl str">"rgl"</span><span class="hl std">)) {</span>
<span class="hl kwd">demo</span><span class="hl std">(</span><span class="hl str">"bivar"</span><span class="hl std">,</span> <span class="hl kwc">package</span> <span class="hl std">=</span> <span class="hl str">"rgl"</span><span class="hl std">,</span> <span class="hl kwc">echo</span> <span class="hl std">=</span> <span class="hl num">FALSE</span><span class="hl std">)</span>
<span class="hl kwd">par3d</span><span class="hl std">(</span><span class="hl kwc">zoom</span> <span class="hl std">=</span> <span class="hl num">0.7</span><span class="hl std">)</span>
<span class="hl std">}</span>
</pre></div>
<div class="message"><pre class="knitr r">## Loading required package: MASS
</pre></div>
</div><div class="rimage center"><img src="http://animation.r-forge.r-project.org/knitr-ex/figure/003-minimal-fancy-rgl.png" title="plot of chunk fancy-rgl" alt="plot of chunk fancy-rgl" class="plot" /></div></div>
<p>Well, everything seems to be working. Let's ask R what is the
value of π? Of course it is <code class="knitr inline">3.1416</code>.</p>
</body>
</html>