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Matrix loop multiplication warning

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Joao
Joao 2014-10-13
评论： Star Strider 2014-10-13
Hello,
I have this code:
n=1;
Eout=zeros(4096,2);
while n<=4096
E=[Eopt(n); 0]; coupler=[sqrt(0.9) 1i*sqrt(0.1);1i*sqrt(0.1) sqrt(0.9)];
Eout(n)=coupler*E;
n=n+1;
end
I would like to have the various n results from Eout (a 2x1 matrix) in 4096x2 matrix. However, when i run this code this warning appears:
??? In an assignment A(I) = B, the number of elements in B and I must be the same.
Error in ==> Sim42 at 62
What should i do?
Thanks

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采纳的回答

Adam
Adam 2014-10-13
编辑：Adam 2014-10-13
Try:
Eout(n,:)=coupler*E;
though I can't tell if that is the only problem with the code you posted.
Which line is actually giving the error? Is it that line or the one above which also may be suspect depending what Eopt is.

更多回答（1 个）

Star Strider
Star Strider 2014-10-13
You should add an extra dimension to the ‘Eout’ assignment:
Eopt = randi(100, 4096, 1); % Create Data
n=1;
Eout=zeros(4096,2);
while n<=4096
E=[Eopt(n); 0];
coupler=[sqrt(0.9) 1i*sqrt(0.1);1i*sqrt(0.1) sqrt(0.9)];
Eout(n,:)=coupler*E;
n=n+1;
end
Then it works!

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