How to resample n vectors with specified length from a longer vector

Question

Levente Gellért 2021-2-24

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/755169-how-to-resample-n-vectors-with-specified-length-from-a-longer-vector

回答： Levente Gellért 2021-2-24

Hi All,

I would like to randomly select n sections (let's say 1000 times) of given length from a longer vector. With the in-built re-sampling functions I can not specify the length of the sections. Sections can overlap.

I do not have initiative at all.

Many thanks!

lg

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Answer 1

Walter Roberson 2021-2-24

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/755169-how-to-resample-n-vectors-with-specified-length-from-a-longer-vector#answer_632314

在 MATLAB Online 中打开

starts = randperm(length_of_vector-length_of_section+1, n).';
subsets = cell2mat(arrayfun(@(S) vector(S:S+length_of_section-1), starts, 'uniform', 0));

Each row of subsets will be a different sample.