Select random numbers from a matrix

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Pei Jia
Pei Jia 2017-12-16
评论： Abdelrahman Mohamed 2023-3-4
I want to select 100 random numbers from a certain column of a matrix. What should I do?

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回答（1 个）

Image Analyst
Image Analyst 2017-12-16
Try this:
y = rand(1000, 3); % Some random data
% Select 100 numbers randomly from column 2:
selected = y(randperm(size(y, 1), 100), 2)

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