Displaying 1 result from an estimated 1 matches for "tp3450862p3452417".
2011 Apr 14
1
modify particular factor levels
Dear list,
I wish to modify programmatically only a few factor levels, according
to a named list. I came up with this function,
modify.levels <- function(f, modify=list()){
## levels that will not be changed
names.old.levels <- setdiff(levels(f), unlist(modify))
## as a named list
old.levels <- as.pairlist(names.old.levels)
names(old.levels) <- names.old.levels
## union