[R] na.action in xtabs - how to include NAs?

Please help: # I have a data frame x: x <- data.frame(a = c(1:3, NA), b = c(NA, 2:4)) # I run a cross-tab keeping NAs, like this: table(x[c("a", "b")], useNA = "ifany") # I want to reproduce it using xtabs, but it ignores NAs: xtabs(~ a + b, x) # I can't figure out how to force xtabs to

Re: [R] na.action in xtabs - how to include NAs?

Try both na.action=na.pass and exclude=NULL, the first is for xtabs' call to model.frame and the second for when it prepares the data from model.frame's output for a call to table. xtabs(formula = ~a + b, data = x, na.action = na.pass, exclude = NULL) Bill Dunlap TIBCO Software wdunlap tibco.com

Re: [R] na.action in xtabs - how to include NAs?

: William Dunlap Cc: r-help Subject: Re: [R] na.action in xtabs - how to include NAs? Thank you very much, Bill - it worked. Wow, that's very wordy! On Wed, Sep 30, 2015 at 11:09 AM, William Dunlap <wdun...@tibco.com> wrote: > Try both na.action=na.pass and exclude=NULL, the first is

Re: [R] na.action in xtabs - how to include NAs?

Thank you very much, Bill - it worked. Wow, that's very wordy! On Wed, Sep 30, 2015 at 11:09 AM, William Dunlap wrote: > Try both na.action=na.pass and exclude=NULL, the first is for > xtabs' call to model.frame and the second for when it prepares > the data from model.frame's