R devel - Sep 2003 - Documentation of colSums et. al (PR#4154)

Full_Name: Doug Grove
Version: 1.7.0
OS: Linux
Submission from: (NULL) (209.31.211.56)


Hi,

Minor mistake in the documentation on the colSums page.
In the ARGUMENTS section it states for 'dims' that:

   For `col*', the sum or mean is over dimensions
   `dims+1, ...'; for `row*' it is over dimensions `1:dims'.

These two are reversed.

Thanks,
Doug Grove

Doug Grove <dgrove@fhcrc.org> wrote:
> Minor mistake in the documentation on the colSums page.
> In the ARGUMENTS section it states for 'dims' that:
>    For `col*', the sum or mean is over dimensions
>    `dims+1, ...'; for `row*' it is over dimensions `1:dims'.
> These two are reversed.
I think Doug is correct, isn't he?  For example, with a 5-dimensional array
and
dims=3, colSums() sums over the first 3 dimensions (the "rows") and
produces a
2-dimensional result.  So the sum is over dimensions 1:dims.

By the way, S-Plus (6.1.2) documentation is also incorrect; it says
"colMeans
is a 2 dimensional array consisting of the means across the last 3
dimensions"
but it's really across the first 3 dimensions.

So why has this bug report ended up in the "trashcan"?
-- 
                              -- David Brahm (brahm@alum.mit.edu)