definition of a vector

why an array of size 1-by-1-by-N is not a vector?

a=randi([1 10],1,1,3);
isvector(a)

ans = logical
   0

[Torsten]

a=randi([1 10],1,1,3);
isvector(squeeze(a))

ans = logical
   1

Answer 1

[the cyclist]

Because, according to the documentation for isvector, "A vector is a two-dimensional array that has a size of 1-by-N or N-by-1".

One can obviously make the argument that that is not a good definition of a vector. But the behavior is well documented.