MATLAB: Random numbers that sum up to a definite integer

random number generator

hi, i would like to generate a column vector using rand function e.g rand(5,1), so that none of the element is bigger than 1 and less than 0. and i want the sum of all the elements to equal 1 exactly. how do i do it?

Best Answer

Use randfixedsum.m function from the following link:

https://www.mathworks.com/matlabcentral/fileexchange/9700-random-vectors-with-fixed-sum?focused=5064802&tab=function

and write

randfixedsum(5,1,1,0,1)

Related Solutions

MATLAB: How to generate a vector of uniformly distributed numbers around 1

>> 2*rand(1,10)
ans =
   1.324304   0.866104   0.570201   1.248882   0.425728   1.720565   0.022849   1.249922   1.828464   1.977158

Of course you could generalize this for a particular offset and range:

off = 0.4;
wid = 1.5
off+wid*rand(...)

MATLAB: Positive definite solution

If the eigenvalues are all positive, you change gama, exiting the loop when they are not all positive. That means that at the end the gama you get out will be such that the eigenvalues are not all positive. This does not satisfy the stated conditions.

Best Answer

Related Solutions

MATLAB: How to generate a vector of uniformly distributed numbers around 1

MATLAB: Positive definite solution

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