[R] working with CGIwithR

From: Chris Evans <chris_at_psyctc.org>
Date: Mon 09 May 2005 - 04:45:07 EST

<headline>Short question</headline>:

Do people have advice on debugging R programs running after CGIwithR inputting of data from forms? Is there a way of setting up fast local versions if your local machine has to be a windoze (2k) machine (R 2.1.0) and your server is a Debian, ssh shell only set up running R 1.8.0? Are there simple guides to ways of not having to invoke R each time you submit data from a form? No complaints here about R or CGIwithR: both brilliant. I just need some help partly because my hardware resources are slow.

TIA, Chris

<H>Long question for those with time and wanting more detail</H>:

I'm not a statistician though I've spent a lot of the last thirty years of my life working with statisticians and doing my own stats part time. I've worked from roll my own in dBaseII, through BMDP, loads of SPSS, SAS & SAS/IML, S+ and now, over the last two to three years, from S+ to R and loving it. However, at times I really hit the limits of my amateur skills. .... and this is one of them!

I've put together some scripts to deal with Jacobson et al.'s ideas of "reliable change and clinically significant" change. They work fine on R 2.10 on my Win2K box and can output to ascii & a windows graphics plot or to HTML and jpg using R2HTML. Now I'm trying to transfer them to my www server which runs Debian stable and R 1.8.0 and I'm using CGIwithR to get the input from people.

All probably fine but the of course I struggled with some aspects of getting the data entry flexible and now something is simply not working as I pass the data to the main bits of the program that I've worked out for local use. I'm sure the problem will turn out to be some trivial incorrect class or the like that's afflicting one of the parameters or bits of data. I won't (yet) waste time here with detail but I'd love advice on ways to get more debugging information and on speeding things up as my server is slow, the only one I can currently afford, and each invocation of the script takes minutes to turn around and even with:
  zz <-file("Rmess.all",open="wt")
I'm not trapping any error messages, the program just appears to skp entering a function I've written and continue on with nary an apology or gentle complaint about my stupidity! Most unlike R!

Thanks to anyone with suggestions!


Chris Evans <chris@psyctc.org>
Consultant Psychiatrist in Psychotherapy, Rampton Hospital; 
Research Programmes Director, Nottinghamshire NHS Trust, 
Hon. SL Institute of Psychiatry
*** My views are my own and not representative of those institutions 

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Received on Mon May 09 04:55:34 2005

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