[Gretl-devel] zero dimension matrix arithmetic

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? Or should I do something completely different in order to avoid the situation? Best Andreas