[R] Reorder factor and address embedded escapes
rob at aetiologic.ca
Fri Dec 10 21:14:04 CET 2010
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 backslash.
"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$reorderA <-factor(test$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.
More information about the R-help