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I want to add a 20 by 20 matrix to a 50 by 50 matrix ? the resuting matrix should be of 50 by 50 .

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Amir
Amir 2015-2-26
回答： Jos (10584) 2015-2-26
For Example : A=5*ones(50) & B=2*ones(20) , how should A+B be evaluated ?
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Amir
Amir 2015-2-26
Mr. Raghavendra did right what i wanted ! But ur question was also in my mind to pad zeros with the smaller matrix. How would u do it

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RAGHAVENDRA
RAGHAVENDRA 2015-2-26
A=5*ones(50)
B=zeros(50);
B(1:20,1:20)=2*ones(20);
C=A+B;

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Jos (10584)
Jos (10584) 2015-2-26
For arbitrary sized 2D matrices A and B:
% example data
A = ones(3,5)
B = 2*ones(4,2)
% engine
szA = size(A)
szB = size(B)
C = zeros(max([szA ; szB]))
C(1:szA(1),1:szA(2)) = A
C(1:szB(1),1:szB(2)) = C(1:szB(1),1:szB(2)) + B

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