random numbers that sum up to a definite integer

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?

Answer 1

[Birdman]

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)

[Muhammad Ridwanur Rahim]

but it is giving me a warning: Function power has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.

[Muhammad Ridwanur Rahim]

and if i write a code like this-

x=randfixedsum(5,1,1,0,1)

then an error message is shown: Output argument "x" (and maybe others) not assigned during call to "randfixedsum".

[John D'Errico]

Randfixedsum has no function defined named power, nor, knowing Roger, would he ever have done that.

Are you sure that you did not define a function named power yourself? Try this:

which power -all

That would indeed cause a major problem in MATLAB, had you done that.

[Muhammad Ridwanur Rahim]

thnx, got the solution.