You can adapt this to your situation:
z <- try( read.table("myfile", header=T) ) if (class(z) == "try-error") z <- data.frame(x=1,y=2,z=3) You may also be interested in the silent= arg of try. See ?try Date: Wed, 11 Feb 2004 19:22:00 -0800 From: Francisco J Molina <[EMAIL PROTECTED]> To: r-help <[EMAIL PROTECTED]> Subject: [R] How to detect whether a file exists or not? I would like my program to load variables x,y,x from a file 'myFile.r' but if this file does not exist, I want my program to create/initialize x,y,z. Does anyone know how to do this? Thank you very much. Francisco J. Molina ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html