[Rd] table(exclude = NULL) always includes NA
Martin Maechler
maechler at stat.math.ethz.ch
Mon Aug 15 11:07:43 CEST 2016
>>>>> Suharto Anggono Suharto Anggono <suharto_anggono at yahoo.com>
>>>>> on Sun, 14 Aug 2016 03:42:08 +0000 writes:
> useNA <- if (missing(useNA) && !missing(exclude) && !(NA %in% exclude)) "ifany"
> An example where it change 'table' result for non-factor input, from https://stat.ethz.ch/pipermail/r-help/2005-April/069053.html :
> x <- c(1,2,3,3,NA)
> table(as.integer(x), exclude=NaN)
> I bring the example up, in case that the change in result is not intended.
Thanks a lot, Suharto.
To me, the example is convincing that the change (I commited
Friday), svn rev 71087 & 71088, are a clear improvement:
(As you surely know, but not all the other readers:)
Before the change, the above example gave *different* results
for 'x' and 'as.integer(x)', the integer case *not* counting the NAs,
whereas with the change in effect, they are the same:
> x <- as.integer(dx <- c(1,2,3,3,NA))
> table(x, exclude=NaN); table(dx, exclude=NaN)
x
1 2 3 <NA>
1 1 2 1
dx
1 2 3 <NA>
1 1 2 1
>
--
But the change has affected 6-8 (of the 8000+) CRAN packages
which I am investigating now and probably will be in contact with the
package maintainers after that.
Martin
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