An efficient way to create a 2D array.

Hey everyone, I am new to matlab. Here is my question:

Suppose, I = [a b c d e; f g h i j; k l m n o; p q r s t];

If (I(current pixel) == I(neighbour pixel)) then E(current pixel,neighbor pixel) = 1; else E(current pixel, neighbor pixel) = 0;

whereas a neighbor pixel is any pixel in 3x3 window centered at the current pixel. (I think this convention is know as the 8-neighbor)

One possible way is to use doubly nested for loop. Is there any more efficient way (using any of these (<http://www.mathworks.com/help/matlab/elementary-matrices-and-arrays.html>) data structure) and please write a hint how to use it since I cannot figure it out by myself.

[David Sanchez]

who do you consider the neighbour pixel(s)? Only the pixel next to the current pixel (left, right, both) ?

[Khurram]

David Sanchez

I have edited the question statement. I am taking 8-neighbors convention.