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Find first row with certain value in x2 array

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Gevin Schaeffer
Gevin Schaeffer 2021-6-7
评论： Gevin Schaeffer 2021-6-8
I have an 300x2 array in which I need to find a certain numbert in colum 1, e.g. 10. Once the number is found I need to extract the corresponding value in colum 2.

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Chunru
Chunru 2021-6-8
idx = A(:, 1) == 10; % find the index that 1st column = 10
b = A(idx, 2); % extract the corresponding data in 2nd column
Or in one line
b = A(A(:,1)==10, 2);

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