How can I get a number meet the Poisson Distribution

[cr4kb0y]

hello all:
I have to program a function which can produce a Poisson
Distribution number,I have no idea about it,
anyone who can give some suggestions? thanks!

[Keith Willis]

On Tue, 13 Nov 2007 04:00:34 -0800, cr4kb0y <zy******@126.comwrote:

I have to program a function which can produce a Poisson
Distribution number,I have no idea about it,
anyone who can give some suggestions? thanks!

Have you looked on Wikipedia? They might be able to help with your
homework.
--
PGP key ID 0xEB7180EC

[Udai Kiran]

On Nov 13, 5:00 pm, cr4kb0y <[e-mail]:

hello all:
I have to program a function which can produce a Poisson
Distribution number,I have no idea about it,
anyone who can give some suggestions? thanks!

use gsl GNU Scientific Library it has function that can generate a
variety of random numbers

"unsigned int gsl_ran_poisson (const gsl rng * r, double mu)"

regards,
Udai.
http://s.udaykiran.googlepages.com

[Martin Ambuhl]

cr4kb0y wrote:

hello all:
I have to program a function which can produce a Poisson
Distribution number,I have no idea about it,
anyone who can give some suggestions? thanks!

<ot>
here's a hint for a recursive form:
freq(0, lambda) = exp(-lambda)
freq(n, lambda) = freq(n-1, lambda) * lambda / n
</ot>

[Mark McIntyre]

On Tue, 13 Nov 2007 04:00:34 -0800, in comp.lang.c , cr4kb0y
<zy******@126.comwrote:

>hello all:
I have to program a function which can produce a Poisson
Distribution number,I have no idea about it,
anyone who can give some suggestions?

This is an algorithms question.
First understand the algorithm - a decent textbook will help with
that.
Then write some code.
Then ask again here if your code doesn't work.

--
Mark McIntyre

"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it."
--Brian Kernighan