How to check for empty matrix, scalar and vector without builtin functions

I am lost on this. How do I check for empty matrix, scalar or vector without using these builtin functions: isempty, isscalar, and is vector?

Some help will be appreciated.

Thanks

Answer 1

[Star Strider]

Using the size function is an option:

x = []
sx = size(x)

produces:

x =

       []

sx =

       0.0000e+000     0.0000e+000

Since this seems to be a homework assignment, I leave the rest to you.

[Millone]

Thats fair. Thanks a lot for you help.

[Star Strider]

My pleasure.