[OctDev] Problems with is_vector and is_matrix

[Simon C. <si...@li...>]

Greetings,

I've recently noticed that is_vector(X) and is_matrix(X) both return
true if X is a scalar.  is_matrix(X) also returns true if X is vector.
I found a message [1] reporting this problem in 1997 and a follow-up
message claiming that the problem was fixed [2].  However, the problem
seems to still exist in Octave 2.1.35.

Is this how is_vector and is_matrix are meant to behave?

I noticed the problem when calling mesh(X,Y,Z) with three vectors (i.e.
while trying to plot the points <X(i),Y(i),Z(i)>). mesh complains
because it attempts to interpret its input as if Z was a matrix (since
is_matrix(Z) returns true).

[1] http://www.octave.org/octave-lists/archive/bug-octave.1997/msg00153.html
[2] http://www.octave.org/octave-lists/archive/bug-octave.1997/msg00159.html

Schiavo
Simon
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