Combining 4 column matrices to form a new single matrix having its column as those column matrices

Iam working on a project where i have 4 different images and their matrices,I have to convert each of these matrices into column matrix and then using all the four column matrices I have to form a new single matrix whose each column is the corresponding column matrices.

Answer 1

[the cyclist]

Your four input image matrices:

 a = rand(5);
 b = rand(5);
 c = rand(5);
 d = rand(5);

Output matrix, where each input matrix is a column:

 e = [a(:),b(:),c(:),d(:)];