Re: [R] does column exist?

From: Chuck Cleland <ccleland_at_optonline.net>
Date: Fri 20 May 2005 - 03:50:57 EST

How about is.null(df$X)==FALSE ?

Omar Lakkis wrote:
> 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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Received on Fri May 20 04:00:02 2005

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