[R] Sum(Random Numbers)=100

[Daniel Malter]

sum.x=sum(x)
while(sum.x!=100)
x=rpois(50,2)

I have tried this, but this can really take some time. In fact, I would
suggest an similarly "fraudulent" activity, draw 49 values, and set the last
nonrandomly to the difference between 100 and the sum of the 49 values if
this difference is a.) nonnegative and b.) not too extreme (say more than
three lambdas out). This is "as random" as the previous approach, maybe even
more.

Best,
Daniel


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cuncta stricte discussurus
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-----Ursprüngliche Nachricht-----
Von: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] Im
Auftrag von Shubha Vishwanath Karanth
Gesendet: Tuesday, July 08, 2008 1:59 AM
An: r-help at stat.math.ethz.ch
Betreff: [R] Sum(Random Numbers)=100

Hi R,

 

I need to generate 50 random numbers (preferably poisson), such that their
sum is equal to 100. How do I do this?

 

 

Thank you,

Shubha

 

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