Re: [Gretl-devel] zero dimension matrix arithmetic
On Sat, 12 Jan 2013, Andreas Noack Jensen wrote:
I have a function which takes lists as argument and then tranform
them to
matrices. However, sometimes the lists are null and I therefore get a 0x0
matrix which is okay but when I concatenate with a nx0 matrix I get a 0x0
matrix. I think a nx0 matrix is more reasonable but I agree that things are
fishy here. An example is
? eval ones(5,1)~{null}
1
1
1
1
1
? eval ones(5,0)~{null}
matrix is null (0 x 0)
What do you say? Would it cause problems elsewhere if the latter was 5x0?
I'm inclined to say that following the pattern of some other recent
changes, producing a 5x0 result here would be consistent. If nobody
raises an objection of principle, I'll make that change.
Allin