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how to extract numbers from array whose sum is constant number?

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BHUKYA VENKATESH
BHUKYA VENKATESH 2022-9-9
关闭： Rik 2022-9-9
I have a randum number array size is (100,1) and i want have 10 elements from this array and their sum should be a constant number.
A=rand(100,1)
B=A(i, j, k,.....)
C=sum(B)==10
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Rik
Rik 2022-9-9
Ran in:
Also, this is never going to work exactly. The rand function returns values between 0 and 1 with double precision. The odds of the sum of 10 values being one specific value are astronomical.
Did you perhaps mean this?
A=randi([0 1],[1,100]) % row vector for more compact display
A = 1×100
1 1 0 1 1 0 0 0 0 1 0 0 1 1 0 1 0 1 0 1 0 1 1 1 1 1 1 0 1 1
You need to round to some degree, either when generating the A array, or when testing the sum.
Rik
Rik 2022-9-9
Instead of posting a new question, you could also have responded in a comment here.
Since this question is now either moot or a duplicate, I will close it.

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