Combining Rows of Cell Arrays-- Alternative Way to combvec?

I previously had another function that used combvec to combine vectors. I am now using strings in the program and am wondering if there would be a way to do the same thing with cell arrays. For example...

A =

    'red'     [1]
    'blue'    [2]

and

B =

    [1]    [4]
    [2]    [4]
    [3]    [4]
    [1]    [5]
    [2]    [5]
    [3]    [5]
    [1]    [6]
    [2]    [6]
    [3]    [6]

I want the combination of cell arrays to happen by row (not sure if that's well explained...) To understand easier, I want the combination, C, to look like this:

C =

    [1]    [4]    'red'     [1]
    [2]    [4]    'red'     [1]
    [3]    [4]    'red'     [1]
    [1]    [5]    'red'     [1]
    [2]    [5]    'red'     [1]
    [3]    [5]    'red'     [1]
    [1]    [6]    'red'     [1]
    [2]    [6]    'red'     [1]
    [3]    [6]    'red'     [1]
    [1]    [4]    'blue'    [2]
    [2]    [4]    'blue'    [2]
    [3]    [4]    'blue'    [2]
    [1]    [5]    'blue'    [2]
    [2]    [5]    'blue'    [2]
    [3]    [5]    'blue'    [2]
    [1]    [6]    'blue'    [2]
    [2]    [6]    'blue'    [2]
    [3]    [6]    'blue'    [2]

How would I do this in a way that would create the combination regardless of the dimensions of the two cell arrays? Thanks in advance!

Answer 1

[Adam Danz]

These two lines below will work for any size 2D arrays.

% Produce an index of A elements to be added to B
idx = transpose(ndgrid(1:size(A,1), 1:size(B,1))); 

% Replicate B for each row of A and then add A elements
C = [repmat(B,size(A,1),1), A(idx(:),:)];

C = 
    {[1]}    {[4]}    {'red' }    {[1]}
    {[2]}    {[4]}    {'red' }    {[1]}
    {[3]}    {[4]}    {'red' }    {[1]}
    {[1]}    {[5]}    {'red' }    {[1]}
    {[2]}    {[5]}    {'red' }    {[1]}
    {[3]}    {[5]}    {'red' }    {[1]}
    {[1]}    {[6]}    {'red' }    {[1]}
    {[2]}    {[6]}    {'red' }    {[1]}
    {[3]}    {[6]}    {'red' }    {[1]}
    {[1]}    {[4]}    {'blue'}    {[2]}
    {[2]}    {[4]}    {'blue'}    {[2]}
    {[3]}    {[4]}    {'blue'}    {[2]}
    {[1]}    {[5]}    {'blue'}    {[2]}
    {[2]}    {[5]}    {'blue'}    {[2]}
    {[3]}    {[5]}    {'blue'}    {[2]}
    {[1]}    {[6]}    {'blue'}    {[2]}
    {[2]}    {[6]}    {'blue'}    {[2]}
    {[3]}    {[6]}    {'blue'}    {[2]}