Hi,
In follow up to the thread on R-Help yesterday:
https://stat.ethz.ch/pipermail/r-help/2019-February/461725.html
I am attaching a proposed patch against the trunk version of Extract.Rd, with
wording added to the "Matrices and arrays" section, to note that indexing these
object by factors behaves in a manner consistent with vectors.
Regards,
Marc Schwartz
--- ExtractORIG.Rd 2019-02-21 08:17:47.000000000 -0500
+++ ExtractMOD.Rd 2019-02-21 08:23:35.000000000 -0500
@@ -151,6 +151,9 @@
indices can be numeric, logical, character, empty or even factor.
An empty index (a comma separated blank) indicates that all entries in
that dimension are selected.
+ As with vectors, indexing by factors is equivalent to indexing by the
+ numeric codes (see \code{\link{factor}}) and not by the character
+ values which are printed (for which use \code{[as.character(i)]}).
The argument \code{drop} applies to this form of indexing.
A third form of indexing is via a numeric matrix with the one column
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