How can I create a vector

2022 8 23
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更新时间：2022 8 23
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I want to create a vector b from the vector a, such as:
a = [2 4 3]
b = [1/2 1/2 1/4 1/4 1/4 1/4 1/3 1/3 1/3]
(note that there are as many fractions in b, as the sum of the vector a. Also, the number of different fractions correspond with the individual values of a)
Is there any easy way to generalize this example?
Thanks

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found a way:
b=[];
for i = 1:length(a)
b=[b,a(i).*ones(a(i),1)']
end
b=b.^(-1);
Matt J
Matt J 2022-8-23
You should be getting Code Analyzer messages discouraging you from growing b iteratively in the loop.

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回答（1 个）

Matt J
Matt J 2022-8-23
编辑：Matt J 2022-8-23
Ran in:

0 个投票

Ran in:
a=[2,4,3];
b=1./repelem(a,a)
b = 1×9
0.5000 0.5000 0.2500 0.2500 0.2500 0.2500 0.3333 0.3333 0.3333

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