New codes() methods
Jonathan Rougier <J.C.Rougier@durham.ac.uk>
Thu, 4 Nov 1999 11:48:06 +0000 (GMT)
On 4 Nov 1999, Peter Dalgaard BSA wrote:
> Looks quite nice. Two things have me worried, though:
> 1) do we really want to convert anything to factors? (try factor(rnorm(10000)))
I agree that this would be undesirable, but not necessarily wrong!
> 2) if a dataframe contains a matrix, it gets converted to something
> with incompatible lengths
This was part of my motivation for including a matrix case in the default
behaviour, but in the end I thought that the error message might be
justified! But the alternative would be
else if (is.matrix(x))
apply(t(x), 1, codes)
but, as I mentioned before, this makes an unwarranted assumption about the
interpretation of the rows and columns of x.
Jonathan Rougier Science Laboratories
Department of Mathematical Sciences South Road
University of Durham Durham DH1 3LE
"[B]egin upon the precept ... that the things we see are to be
weighed in the scale with what we know" (Meredith, 1879, The Egoist)
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