Can I assign elements of one cell array to multiple elements of another cell array without a loop?

Question

Tom 2020-9-19

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https://ww2.mathworks.cn/matlabcentral/answers/596440-can-i-assign-elements-of-one-cell-array-to-multiple-elements-of-another-cell-array-without-a-loop

回答： KSSV 2020-9-19

For example, I have two cell arrays:

myArray = {'One', 1000; 'Two', 2000; 'Three', 3000; 'Four', 4000; 'One', 5000; 'Five', 6000};
anotherArray = [({'One', 'Two', 'Three', 'Four', 'Five'})', ({1, 2, 3, 4, 5})'];

I would like to assign elements of anotherArray(:,2) to myArray, whenever the elements of their first columns match by using strcmp and afterwards indexing.

idx = cellfun(@(x) strcmp(x, anotherArray(:,1)), myArray(:,1), 'UniformOutput', false);

But obviously, the following doesn't work:

Out = [myArray, anotherArray(idx{:,1},2)];

A for loop would work, and I would get the desired output, but I think there has to be another way without a for loop!

Out = cell(numel(idx),3);
for i = 1:numel(idx)
    Out(i,1:3) = [myArray(i,:), anotherArray(idx{i,1},2)];
end

Thanks for any suggestions!

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Answer 1

KSSV 2020-9-19

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https://ww2.mathworks.cn/matlabcentral/answers/596440-can-i-assign-elements-of-one-cell-array-to-multiple-elements-of-another-cell-array-without-a-loop#answer_497197

myArray = {'One', 1000; 'Two', 2000; 'Three', 3000; 'Four', 4000; 'One', 5000; 'Five', 6000};
anotherArray = [({'One', 'Two', 'Three', 'Four', 'Five'})', ({1, 2, 3, 4, 5})'];
[c,ia] = ismember(myArray(:,1),anotherArray(:,1)) ;
Out = [myArray anotherArray(ia,2)] ;