[R] Accessing R applications from Web

Bos, Roger roger.bos at us.rothschild.com
Thu Apr 19 18:12:24 CEST 2007

I guess you would have to do all those step for a Internet based portal,
but if you just want to have a web interface on a _Intranet_ portal
where you trust your users, you can use Rpad which is much easier in
that you don't really have to write any code, just do the install
procedure.  There is a Google group for Rpad as well, if you have more
questions about it. 



-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of John McNeil
Sent: Thursday, April 19, 2007 11:42 AM
To: d.sarthi maheshwari
Cc: r-help at stat.math.ethz.ch
Subject: Re: [R] Accessing R applications from Web


I have done what you describe using PHP and R on a linux server.  
Basically, you follow these steps:
- Create a form to gather input
- Parse input from the form with PHP into a file that R can read
- Run R commands from PHP with exec().
- Convert the postscript output to an image a web browser can read,
- Use HTML/PHP to format the output with a link to the image

I learned to do this by studying Alfredo Pontillo and Angelo Mineo's
R-php (http://dssm.unipa.it/R-php). Specifically, look at the file
pages/result/index.php  They have done lots of other good stuff in their
project, like filtering dangerous commands - you would not want to let a
user just type in any R code, because they could seriously damage your
server. However, if you keep the R code on the server, and just parse
numeric or string inputs, you can take the simple approach described

You will need to install GhostScript (http://www.gnu.org/software/
ghostscript/ghostscript.html) and ImageMagick (http://
www.imagemagick.org/) on your server for the image conversion

Feel free to email me directly if you have problems


On Apr 19, 2007, at 2:46 AM, d. sarthi maheshwari wrote:

> Hi
> I am trying to provide web interface to my R application. My 
> requirements are simple and can be written down as follows :
> 1) User must provide all the input parameters on web interface.
> 2) Based on the input values, R will do some computations.
> 3) Project the numerical results as well as plots as html page to the 
> user on web.
> Kindly tell me which package can help me in doing this. Your help 
> would be highly appreciated.
> --
> Thanks & Regards
> Sarthi M.
> 	[[alternative HTML version deleted]]
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
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> PLEASE do read the posting guide http://www.R-project.org/posting- 
> guide.html and provide commented, minimal, self-contained, 
> reproducible code.

R-help at stat.math.ethz.ch mailing list
PLEASE do read the posting guide
and provide commented, minimal, self-contained, reproducible code.

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