How can I sum up two indices to then change the value of the sums that are even?

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Valeria Chacon
Valeria Chacon 2016-11-19
回答： Jan 2016-11-19
theta=zeros(N,N);
index=(mod(theta,2)==0)
N in this case is any number inputed by the user. N is the dimensions of a matrix. So if the user inputed 2 then it would be [0,0 ; 0,0] how ever i need to make the sum of every 2 indices that is even to equal to 1. So the sum would be 1+1, 2+1, 2+1, and 2+2 and the result that I'm looking for is [1,0 ; 0,1]. Is there any way I can sum two indices to then change their value?

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采纳的回答

Jan
Jan 2016-11-19
In Matlab 2016b with automatic expanding:
theta = (1:N) + (1:N).'
And in former versions:
theta = bsxfun(@plus, (1:N), (1:N).')

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