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Does available funtion in Matlab can extract rows satisfied a condition?

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binh23294 2020-9-28

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评论： binh23294 2020-9-28

采纳的回答： Ameer Hamza

I want to create a matrix has rows has first column value = 4 from matrix a; like

Does available funtion in Matlab can extract rows satisfied a condition? Thanks so much!

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Ameer Hamza 2020-9-28

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https://ww2.mathworks.cn/matlabcentral/answers/601369-does-available-funtion-in-matlab-can-extract-rows-satisfied-a-condition#answer_501790

编辑：Ameer Hamza 2020-9-28

在 MATLAB Online 中打开

Read about array indexing: https://www.mathworks.com/company/newsletters/articles/matrix-indexing-in-matlab.html and https://www.mathworks.com/help/matlab/math/array-indexing.html

a = [4 5 6;
     4 5 6;
     5 5 6];
 
idx = a(:,1)==4;
b = a(idx, :);

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binh23294 2020-9-28

Thanks for help!

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