Please explain me on Attempted to access C_copy(1,:);

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Prabha Kumaresan 2017-12-29

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https://ww2.mathworks.cn/matlabcentral/answers/374857-please-explain-me-on-attempted-to-access-c_copy-1

回答： Walter Roberson 2017-12-29

N_UE=[10 20 30 40 50];
N_SC=[60 70 80 90 100];
C=rand(N_UE(t),N_SC(r));
C_copy = C;
sz=length(C_copy(1,:))
Attempted to access C_copy(1,:); index out of bounds because size(C_copy)=[0,100].

why I am getting Attempted to access C_copy(1,:); could anyone explain on this

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Answer 1

Walter Roberson 2017-12-29

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Your C_copy has become empty. C_copy(1,:) does not exist to take the length() of. You should not have been using length() at all there: you should be using

sz = size(C_copy, 2);

However I would suggest to you that you have a bug there and that you should instead have been using

sz = length(C_copy(:,1))

the better version of which would be

sz = size(C_copy, 1)