xyTable(x,y) versus table(x,y) with NAs

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xyTable(x,y) versus table(x,y) with NAs

Viechtbauer Wolfgang (SP)
Hi All,

I asked this over at r-help, but didn't get any responses. As this seems like a bug (or at least undocumented behavior) to me, I'll try again here.

It seems to me that xyTable() gets thrown off by NAs:

x <- c(1, 1, 2, 2,  2, 3)
y <- c(1, 2, 1, 3, NA, 3)
table(x, y, useNA="always")
xyTable(x, y)

Is this intended behavior?

Best,
Wolfgang

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