how to draw random numbers from the vector

Question

Nathalie 2014-3-19

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/122291-how-to-draw-random-numbers-from-the-vector

回答： José-Luis 2014-3-19

采纳的回答： Jos (10584)

Hi, i have drawn a distribution based on on the generated vector of random numbers.

My question is:

how to draw randomly 10 numbers, and , therefore, 10 values of that distribution.
if it's impossible to find the values of this distribtution, how to simply draw 10 random numbers from , for example, vector of 1000 numbers.

Thanks.

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Answer 1

Jos (10584) 2014-3-19

2
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https://ww2.mathworks.cn/matlabcentral/answers/122291-how-to-draw-random-numbers-from-the-vector#answer_129174

在 MATLAB Online 中打开

If V is your vector of numbers, and N the number of values you want from it, there are various options:

V = 1:2:20, N = 5 % example data
R1 = V(ceil(numel(V)*rand(N,1)) % N random numbers with replacement
R2a = V(randperm(numel(V),N))) % N random values from V without replacement
R2b = randsample(V,N) % same, if you have the Statistics Toolbox
% and many more