Randomly splitting of a number in a sum format.
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Suppose n=5
we can split this number like
5=3+2,4+1..... so on.
But I just want to select a only one sum but randomly and I would like to specify by using varible
like
5=1+3+1
then n_{1}=1, n_{2}=3, n_{3}=1.
How to implement matlab code for any value of n as per above method.
Please help me.
Thanks in advance.
2 个评论
John D'Errico
2021-4-27
编辑:John D'Errico
2021-4-27
PLEASE STOP ASKING THE SAME QUESTION!
You have asked 6 questions so far on ANSWERS. 5 of them have been essentially duplicates. The rest of them had answers already, but I just closed the latest one, and will now close further duplicate questions by you. You have already gotten multiple answers to your question.
John D'Errico
2021-4-27
编辑:John D'Errico
2021-4-27
No. There have been multiple questions about random partitions of a set. Learn how to find the set of all partitions, then choose one randomly. You cannot create variable names on the fly, and to the extent that you can do so, you SHOULD not. Instead, learn to use vectors.
采纳的回答
Bruno Luong
2021-4-27
编辑:Bruno Luong
2021-4-27
n = 10;
for j=1:10
r = n;
i = 1;
clear s
while r > 0
s(i) = ceil(r*rand);
r = r-s(i);
i = i+1;
end
disp(s)
end
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Bruno Luong
2021-4-27
编辑:Bruno Luong
2021-4-27
This code will generate "uniform" partition distribution, in the sense that all possible partition has equal probability:
n = 10;
% This part is done once if n is fix
L = 1:n;
p = arrayfun(@(k) nchoosek(n-1,n-k), L);
e = [0, cumsum(p)];
e = e/e(end);
% This part must be repeated when an new random partition is requested
[~,k] = histc(rand,e);
h = diff([0 sort(randperm(n-1,n-k)) n]);
H = mat2cell(L, 1, h)
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