[Rd] bug (?) in [.data.frame with matrix-like indexing

From: Uwe Ligges <ligges_at_statistik.uni-dortmund.de>
Date: Sun, 14 Oct 2007 17:36:06 +0200


Consider in R-2.6.0 (also R-patched from yesterday):

iris[1, c(TRUE, FALSE, FALSE, FALSE, FALSE)]
## Error in .subset2(xx, j) : recursive indexing failed at level 2

iris[1, c(FALSE, FALSE, FALSE, FALSE, TRUE)]
## Error in .subset2(xx, j) : attempt to select less than one element

i.e. matrix-like indexing on data.frames, one logically-indexed dimension with only one value TRUE in it.

It is not documented to work, but it did so in former versions of R. Is it a bug or withdrawn support?

Uwe Ligges



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