How od i generate random numbers whose sum is constant?

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BHUKYA VENKATESH
BHUKYA VENKATESH 2022-9-9
评论： BHUKYA VENKATESH 2022-9-9
I want 100 random numbers bu their sum should be same.
  2 个评论
Torsten
Torsten 2022-9-9
You want to generate 100 random numbers several times, I guess ? Because if you generate 100 random numbers once, there is only one sum.

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Bruno Luong
Bruno Luong 2022-9-9
If the numbers are supposed to be >= 0 with precribed sum, a simple method is
n = 100;
s = 10;
Y = -log(rand(1,n));
X = s * Y ./ sum(Y,2)
sum(X)
The justification of log is from the ubiased conditioning probability that I explain here:
https://uk.mathworks.com/matlabcentral/answers/715393-generate-random-number-with-total-sum-is-10?s_tid=srchtitle

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Bruno Luong
Bruno Luong 2022-9-9
编辑：Bruno Luong 2022-9-9

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