On Thu, Jun 9, 2011 at 11:09 AM, amrita gs <ammasamri...@gmail.com> wrote: > I will explain more clearly.... > > I have an online feedback form which has all the form elements like > radiobuttons,checkboxes,textareas,textboxes etc. I have to get the values of > these form elements and use it for data analysis in R. It will be huge > amount of data. > > 1) Is it possible in R to retrieve the values of these form elements > directly. > > 2) Is there any storage mechanism in R to store the values. > 2) Do i have to store the data in some files or db and then import them in > R and use for data analysis. Is this better?????
Are you analysing individual forms independently and giving rapid feedback? For example, a user puts some numbers in a box, clicks 'fit', and expects to see some parameters back and maybe a plot? Then you need R integrated with the server. Or are you doing summaries of many form submissions perhaps weekly or at the end of the study period? There's a problem with using R to store values coming from a web form - concurrency. Suppose two people submit the form at more or less the same time. If your web server back-end is using R to save the data you need to make sure the two processes aren't trying to write to the same file at the same time or you'll corrupt it. Databases such as Postgres sort this out by having clever locking mechanisms. If you are doing 'batch' analysis like this then you don't need R involved with the server at all, and things are much simpler. Just use a web server back end that suits you (java servlet, PHP, python web application framework) that takes the form data and adds it to a data base such as Postgres or MySQL. Then to do the analysis, R can get the data from such DBs and you can figure out how to produce your pie charts easily... You say you are a beginner in R, so best to leave it and use something else for the web side of things. What aren't you a beginner in? Barry ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
