selection from matrix with condition

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Dam 2012-12-6

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Hi to all, actually i m having a matrix X=250*10 from which i want to choose the colomns that have an average >0.1 and a standard diviation >0.2 and put them in a new matrix 250*k ((where k depends on the colomns that satisfy the 2 (between 0 and 10)) Thank you in advance for your help with this

best regards

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Answer 1

Image Analyst 2012-12-6

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https://ww2.mathworks.cn/matlabcentral/answers/55950-selection-from-matrix-with-condition#answer_67777

在 MATLAB Online 中打开

How about this:

stdX = std(X, 1)
meanX = mean(X, 1);
meetCriteria = meanX > 0.1 & stdX > 0.2
out = X(:, meetCriteria);

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Image Analyst 2012-12-6

Hopefully this wasn't your homework!!!

Dam 2012-12-6

Thank you for your answer it s not my homework i m learning matlab alone so this question could be very easy for you but for me it s not :) Thank you once more Dima

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