Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
Drexel University or The Math Forum.


Torsten
Posts:
1,449
Registered:
11/8/10


Re: Random numbers generation with variable bound
Posted:
Jan 16, 2014 5:03 AM


"Simone" wrote in message <lb888f$enq$1@newscl01ah.mathworks.com>... > I need to create a vector of N random numbers x(N) that satisfies the following constraints: > > sum x(i) = s > lb(i) < x(i) < ub(i) for i ? {1...N} > > where s is a scalar and lb(N) and ub(N) are vectors. > > Note that the lower and the upper bounds are different for each i. I found randfixedsum function but the upper and lower bounds have to be the same for each number. > > How can i solve this problem?
Take a look at https://www.mathworks.com/matlabcentral/newsreader/view_thread/324503 1. Divide your bounds by s 2. Generate a random vector x~ with the code above 3. Set your x to s*x~.
Best wishes Torsten.



