Array Concatenation with Implicit Expansion

Versions of cat(), horzcat(), and vertcat() that support implicit expansion

This submission contains versions of cat(), horzcat(), and vertcat() that support implicit expansion. Here are some examples,

%EXAMPLE 1: Horizontal concatenation

    >> C=ieHorz(ones(3), [3,5])
    
    C =
    
         1     1     1     3     5
         1     1     1     3     5
         1     1     1     3     5
         
%EXAMPLE 2: Vertical concatenation

    >> C=ieVert(ones(3), [3;5])
    
    C =
    
         1     1     1
         1     1     1
         1     1     1
         3     3     3
         5     5     5

%EXAMPLE 3: General concatenation

    >> C=ieCat(3, ones(3), [3;4;5])
    
    C(:,:,1) =
    
         1     1     1
         1     1     1
         1     1     1
    
    
    C(:,:,2) =
    
         3     3     3
         4     4     4
         5     5     5