convert 16X16 to 256X256

i have a 16X16 matrix.. i have to add it to a 256X256 matrix.. can anyone help me how to make this 16X16 matrix into 256X256 filling the remaining with zeros?? thank u in advance..

Answer 1

[Walter Roberson]

B = zeros(256,256);

B(1:size(A,1),1:size(A,2)) = A;  %upper left

B(end-size(A,1)+1:end, 1:size(A,2)) = A; %lower left

With obvious generalizations to upper right and lower right

c = floor((size(B)-size(A))/2);
B(c(1)+1:c(1)+size(A,1), c(2)+1:c(2)+size(A,2)) = A;  %center

The centering algorithm biases towards the upper left if the sizes are not both even or not both odd.

[Jan]

Exhaustive answer. +1

Answer 2

[Jan]

Another method:

A = rand(16, 16);
A(256, 256) = 0;

The other zeros are created automatically. Walter's method is more powerful, because this one inserts the zeros on the right bottom only.