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I have a matrice A 15*15 with random numbers , i wanna put zeros in arrays outside A(5:8,5:8) ,how can i do this?

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Akshit 2015-3-10

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评论： Image Analyst 2015-3-10

I have a matrice A 15*15 with random numbers , i wanna put zeros in arrays outside A(5:8,5:8) ,how can i do this?

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Star Strider 2015-3-10

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One way:

A = rand(15);
B = zeros(15);
B(5:8, 5:8) = A(5:8, 5:8);
A = B;

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Image Analyst 2015-3-10

Looks like it does the job. Akshit might want to Accept it to give you Reputation points, and might also accept some/most of his other questions also.

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MATLAB Language Fundamentals Matrices and Arrays Creating and Concatenating Matrices

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