[R] Reorder factor and address embedded escapes
dwinsemius at comcast.net
Fri Dec 10 21:31:21 CET 2010
On Dec 10, 2010, at 3:14 PM, Rob James wrote:
> I am trying to reorder a factor variable that has embedded escape
> characters. The data begins as a csv file with a factor that
> includes embedded new line characters. By the time read.table has
> rendered it into a data frame, the variable now has an extra
> "This\nLabel" in the csv becomes "This\\nLabel" in the data frame.
> So, I am trying to reorder the factor and deal with the introduction
> of a secondary \ . Here's a small example:
> A = c("A\\nB", "C\\nD")
> test <-data.frame(A)
> test$reorderA <-factor(test$A, c("C\\nD", "A\\nB"))
> test$reorderB <-sub("\\\\n", "\n", test$reorderA)
> When sub is applied to the now-correctly ordered factor, it returns
> to the default ordering.
Actually it returns a character vector rather than a factor.
Perhaps you should ask a question.
David Winsemius, MD
West Hartford, CT
More information about the R-help