[R] Accessing R applications from Web
jam at xardas.com
Thu Apr 19 17:42:00 CEST 2007
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 above.
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:
> I am trying to provide web interface to my R application. My
> 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
> PLEASE do read the posting guide http://www.R-project.org/posting-
> and provide commented, minimal, self-contained, reproducible code.
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