I have 32x32 matrix...But I want to make this a 512x512 matrix with the same element as in the 32x32 matrix..and the rest of which would be zero in 512x512 matrix.. how do i do it??

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Sanik on 18 Dec 2014
Commented: Image Analyst on 3 Jan 2015
I have 32x32 matrix...But I want to make this a 512x512 matrix with the same element as in the 32x32 matrix..and the rest of which would be zero in 512x512 matrix.. how do i do it??

Stephen23 on 18 Dec 2014
Edited: Stephen23 on 20 Dec 2014
There is no need to waste time or space with loops or even copying the data from one matrix to another. Try this instead:
A = rand(32);
A(512,512) = 0;
The first line creates a matrix of size 32x32, the second line allocates the value zero to the element at position (512,512). Of course there is no such element, so MATLAB enlarges the matrix, and automatically fills all of the missing values with zero.

Sudharsana Iyengar on 18 Dec 2014
A=32x32 matrix
B=zeros(512)
for i= 1:32
for j=1:32
B(i,j)=A(i,j)
end
end
try this
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Image Analyst on 20 Dec 2014
Edited: Image Analyst on 20 Dec 2014
Thank you so much...I just now tried this one:
B=zeros(512);
A=32x32;
B(1:32,1:32,:)=A;
and yea this is working too. Thanks...
Image Analyst on 3 Jan 2015
I accepted Stephen's answer for you, since this was his idea. But I agree with him that the "trick" he used in his answer is preferable, though a little less explicit and obvious. Please give him reputation points by voting for his answer.