[R] does column exist?

From: Omar Lakkis <uofiowa_at_gmail.com>
Date: Fri 20 May 2005 - 03:42:21 EST


How do I test if a data.frame has a column named X? exists(o) checks if the object exists or not, I want to test if a data.frame object (df) has a column names(X), something like: exists(df$X)



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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri May 20 03:50:05 2005

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