examples-r/README.md

# The R Project for Statistical Computing

R is an open source programming language. It has become one of the powerful choices for statistical analysis. R helps you to get big picture of your data by calculating statistical parameters like mean, standard deviation, correlation etc.

[wikipedia.org/wiki/R_](https://en.wikipedia.org/wiki/R_(programming_language))


##  LabInstance R


![alt text](images/swarmlab-network.png "")


## Quickstart

This is a quickstart guide of howto use this *LabInstance*

### HowTo use it


- On step "*1. Select Git Repo*" [see here](http://docs.swarmlab.io/SwarmLab-HowTos/HowTo-create-lab.adoc.html)
choose "*examples-r*"

- On step "*2. Select swarm service*" choose "*ondemand_r_master*"

- On step "*3. Save Lab Instance*" put the name you want

- Save it.

Your are ready to run your fresh *LabInstance* [see here](http://docs.swarmlab.io/SwarmLab-HowTos/HowTo-create-lab.adoc.html#_run_instance)


### Default Configuration 

- Working Directory

> /root

- Default user

> root

- Buid-in Web Server

> /var/www/html/[Lab_Instance Name]

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**INFO** 

*Lab_Instance Name* = The name you give [here](http://docs.swarmlab.io/SwarmLab-HowTos/HowTo-create-lab.adoc.html#_step_3_save_lab_instance)

You can also find [here](http://docs.swarmlab.io/SwarmLab-HowTos/index.adoc.html#_main_lab_intance_interface)

Usage: See examples/PieChart.R 

> e.g. png(file = "/var/www/html/examples_r/piechart.png")

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- install R packages

Here is a simple code to install all the necessary R packages to keep you up and running. The script will check whether the required packages have been installed, if not, it will install them accordingly.

> install <- function(packages){
>  
>   new.packages <- packages[!(packages %in% installed.packages()[, "Package"])]
>  
>   if (length(new.packages)) 
>  
>     install.packages(new.packages, dependencies = TRUE)
>  
>   sapply(packages, require, character.only = TRUE)
>  
> }
>  
>  
> required.packages <- c("package1", "package2" )
>
> install(required.packages)


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**MORE INFO** 

See swarmlab and examples directory
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