select parts of vector with loops

Question

jj27 2018-10-12

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https://ww2.mathworks.cn/matlabcentral/answers/423669-select-parts-of-vector-with-loops

回答： Nicolas Schmit 2018-10-15

So I know this is basic matlab stuff but I don't get it right now. lets say i have vector Y, now i want to remove values below a certain vallue from the first ten data points the second ten data points etc. I have to put in a loop so I can add more functions to it. What i mean is select from Y point 1:10,11:20,21:30 etc and do it with a loop.

Can someone help?

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Stephen23 2018-10-12

@ Kjell Lemmen: it is not very clear what you are trying to do. Please show us an example, complete with both input and output vectors.

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Answer 1

Nicolas Schmit 2018-10-15

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https://ww2.mathworks.cn/matlabcentral/answers/423669-select-parts-of-vector-with-loops#answer_341426

在 MATLAB Online 中打开

Y = rand(100, 3);
d = 10;
for k=1:size(Y, 1)/d
    % Select a chunk of data from Y
    index = d*(k-1)+1:d*k;
    Ytemp = Y(index, :);    
    % Do what you want to Ytemp   
    % Put the data back in Y
    Y(index, :) = Ytemp;
end