_DataTools.Rmd

# Data Tools 


- Installations for Data Science. Anaconda, RStudio, Spark, TensorFlow, AWS (Amazon Web Services).

https://medium.com/@GalarnykMichael

https://github.com/mGalarnyk/Installations_Mac_Ubuntu_Windows

- Google Cloud for Data Science: Beginner's Guide
https://www..com/community/tutorials/google-cloud-data-science

- Deep Learning With Jupyter Notebooks In The Cloud
https://www..com/community/tutorials/deep-learning-jupyter-aws

https://www..com/community/tutorials/homebrew-install-use





```
system() function works when I use R from terminal but not from RStudio #2193

https://github.com/rstudio/rstudio/issues/2193

myTerm <- rstudioapi::terminalCreate(show = FALSE)
rstudioapi::terminalSend(myTerm,  esearch -db pubmed -query '(diabetes AND pregnancy) AND (\ 2017/01/01\ [PDAT] : \ 2017/12/31\ [PDAT])' | efetch -format xml | xtract -pattern Grant -element Agency | sort-uniq-count-rank | head -n 10 > myquery.txt \n )
Sys.sleep(1)
repeat{
    Sys.sleep(0.1)
    if(rstudioapi::terminalBusy(myTerm) == FALSE){
        print( Code Executed )
        break
    }
}
```



```
{r eval=FALSE, include=FALSE, echo=TRUE}
library(datasets) # initialize
library(help=datasets) # display the datasets
```



```
{r eval=FALSE, include=FALSE, echo=TRUE}
class(airquality)  # get class
sapply(airquality, class)  # get class of all columns
str(airquality)  # structure
summary(airquality)  # summary of airquality
head(airquality)  # view the first 6 obs
fix(airquality)  # view spreadsheet like grid
View(airquality)
rownames(airquality)  # row names
colnames(airquality)  # columns names
nrow(airquality)  # number of rows
ncol(airquality)  # number of columns
```