replicate a matrix, make it bigger, but don't tile

Hi, How do I replicate a matrix and double its size without tiling the way repmat does? So how do I get [1,2;3,4] to be [1,1,2,2;3,3,4,4]? Do I have to loop and assign each element or is there a function that would so this? Ray

Answer 1

[Image Analyst]

If you have the Image Processing Toolbox:

out = imresize(in, [desiredNumberOfRows, desiredNumberOfColumns], 'nearest');