Cell contents reference from a non-cell array object.

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Mira le 2019-11-16

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/491465-cell-contents-reference-from-a-non-cell-array-object

编辑： Guillaume 2019-11-17

在 MATLAB Online 中打开

Error in Evaluation (line 67)

U = [U TI(1).Si{a}];

here is my code, how can i fix this error?

T1 = Evaluation( pop,SI,D,N,m,T1,MST,NS)
chr.id=[];
chr.sequence=[];
chr.Si={};
chr.relevant=[];
chr.vic_item = [];
TI=repmat(chr,numel(N/2));
U =[];
for a=1:numel(TI(1).Si)
    U = [U TI(1).Si{a}];
    
end
U = unique(U,'first');
U;

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Mira le 2019-11-17

编辑：Mira le 2019-11-17

Is there another method to replace this U = [U TI(1).Si{a}]; ?

Guillaume 2019-11-17

编辑：Guillaume 2019-11-17

在 MATLAB Online 中打开

You need to pay attention to the comments you were given. It's very difficult to help you when you provide code that has no comment and doesn't work.

As Walter explained, numel(N/2) is always the same as numel(N). The actual values of N don't matter to know how many elements there are, so dividing the values by 2 doesn't change their count. If N is scalar, whether it's 10, 1 million or 0, numel(N) is 1. so your

T1 = repmat(chr,numel(N/2));

doesn't do anything useful, it's simply

T1 = chr;

As the cyclist explained, with the given code T1.Si (which is chr.Si) is an empty cell array, so numel(T1.Si) is 0 and the loop

for a=1:numel(TI(1).Si)

doesn't even execute once. So the code you've shown cannot produce your error.

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