Displaying 1 result from an estimated 1 matches for "tp3942755p3943157".
2011 Oct 27
2
Consistant test for NAs in a factor when exclude = NULL?
Dear folks?
Is there a function to correctly find (and count) the NAs in a factor when
exclude=NULL, regardless of whether their origin is in the original data or
by subsequent assignment?
In example number 1 below, where NAs are assigned by is.na()<-, testing the
factor with is.na() finds the correct number of NAs. In example number 2,
where the NAs are from the data, neither is.na(), ==NA,