[R] Undefined columns selected
A.Robinson at ms.unimelb.edu.au
Fri Apr 29 03:56:42 CEST 2011
it looks like some of the columns that you are selecting don't exist.
What is the output of str(arc) before you run the code below?
On Thu, Apr 28, 2011 at 04:49:41PM -0700, Jennifer Wessel wrote:
> This is part of my program. I am getting an error, that I cannot figure out, any help would very much appreciated, thanks.
> # subset variables
> arc <- arc[,c("SNAP", "code", "ncode", "var", "n_total")]
> Error in `[.data.frame`(arc, , c("SNAP", "code", "ncode", :
> undefined columns selected
> arc$N_eff <- with(arc, ifelse(var > 1, n_total, var * n_total))
> Error in storage.mode(test) <- "logical" : object 'var' not found
> R-help at r-project.org mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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