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?