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Re: Generating N random numbers that add to a TOTAL [message #89229 is a reply to message #89228] Wed, 06 August 2014 21:24 Go to previous messageGo to previous message
cgguido is currently offline  cgguido
Messages: 195
Registered: August 2005
Senior Member
Looking at the output of the above, it didn't seem like the numbers were uniformally distributed, so to speak...

Just had a thought:

If I generate N-1 numbers between 0 and TOTAL, then I could use the intervals between the sorted numbers no?

Something like:

n = 4
total = 100
r=randomu(seed,n-1)*total
sr=[r[sort(r)], total]
res= sr-shift(sr,1)
res[0] = sr[0]
print, res, total(res)

Still have problems if I round the result. Don't always get total(res)=TOTAL...

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