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) cmd_args = commandArgs(); for (arg in cmd_args) cat(" ", arg, "\n", sep="") respmat <- read.table("C:\\rphp\\responsedata.txt") fit3pl <- tpm(respmat) cat(" ", arg, "\n", sep="") b <- c("C:\\rphp\\",arg) png(file=b, bg="transparent") plot(fit3pl,items=c,lwd=3) dev.off() rm(respmat,fit3pl,b) q() Could you please help me in doing so? I get an error message when R executes png(). Thanks and Regards, Maulik [[alternative HTML version deleted]] ______________________________________________ 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.