MATLAB: How to randomly extract a element in a vector

randomvectors

Hi!!

How can I extract a random element from a vector?

For example, I have vector v = [a1 a2 a3 a4] and I want to randomly select one of the elements. ~

Thanks!!

Best Answer

random_element = v(randi(numel(v)))

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MATLAB: How to create a vector with elements randomly chosen from another vector

I have a column vector, each of whose elements is a row vector consisting of two elements

The common term for that is a matrix.

If you want to sample without replacement, use randperm to determine which rows of your matrix you want to include and then use subscripted indexing to extract the selected rows.

If you want to sample with replacement, use randi to generate the row indices then use subscripted indexing just like in the randperm (without replacement) case.

MATLAB: Randomly select an element

use randsample

https://www.mathworks.com/help/stats/randsample.html

 randsample(A,1)

Best Answer

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MATLAB: How to create a vector with elements randomly chosen from another vector

MATLAB: Randomly select an element

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