[R] Function storing error messages in 32 bit R-2.15.2 version

\\testFile.txt") > params<-tpm(resp) >warnings() NULL Thanks and regards, Maulik Shah [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the po

[R] Capturing error messages while running R through an external program

I am trying to automate scoring done by applying 3 parameter model of IRT to the response data. I call R from PHP to do this using exec(). Since I face convergence issues while using R, it is important that the program captures the error messages like "the solution is not stable" given by R while r

[R] Getting stable solution while applying 3 parameter model (tpm) on response data

I have started exploring potential of R in applying IRT to a dataset. I have a data of about 20k students who took a Maths test, a diagnostic in nature. I find that I don't get stable solution while using tpm() even after passing an argument "start.val = RANDOM". What should be done in this case t

Re: [R] Passing the parameter (file name) to png()

Thanks a lot! Regards, Maulik On Sat, Jun 26, 2010 at 4:43 AM, jim holtman wrote: > b <- paste("C:\\rphp\\",arg, sep='') > > On Sat, Jun 26, 2010 at 12:55 AM, Maulik Shah > wrote: > > I am fitting 3 parameter model to my response matrix and want to gen

[R] Passing the parameter (file name) to png()

I am fitting 3 parameter model to my response matrix and want to generate item characterstic curve. I want to specify file name to save item characterstic curve by passing it as external parameter to the R batch script. The following is the code I have written for this. *R Script:* library(ltm) c

[R] Plot ICC one item each in ltm

May I ask for the help on how to plot Item characteristic curve (ICC) one item each. I have fit 3 parameter model for a test with 40 items.Currently I get ICC for all the 40 items in a single graph making it difficult to interpret. Thanks and Regards, -- Maulik Shah [[alternative HTML

[R] Using ltm to calculate ability values of 20k students and getting the output

itite; solution is unstable." What could be the reason for this? - Can I run R script from PHP? Regards, Maulik Shah [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEA