[R] How to detect whether a file exists or not?
ggrothendieck at myway.com
Thu Feb 12 04:43:17 CET 2004
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 <fjmolina at ams.ucsc.edu>
To: r-help <r-help at stat.math.ethz.ch>
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
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