Write a function called classify that takes one input argument x. That argument will have no more than two dimensions. If x is an empty matrix, the function returns -1. If x is a scalar, it returns 0. If x is a vector, it returns 1. Finally, if x is none of these, it returns 2. Do not use the built-in functions isempty, isscalar, or isvector.

function out = classify(x)
[n m] = size(x);
if nargin==1
    if n==0 || m==0
        out=-1;
    elseif n==1 && m==1
        out=0;
    elseif n==1 && m>1
        out=1;
    elseif m==1 && n>1
        out=1;
    %elseif n>1 && m>1
        %out=1;
    else
        out=2;
    end
else
    out=2;
end