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Hello:
I´m trying to simulate a Poisson distribution, but I´m facing the problem of not having the factorial function. I’m running out of ideas. Is there a way in which I can calculate n! or at least the (n, r) permutaion?
Well, this is not ideal, but if your range for n is limited enough, you could create one table that calculates the various values for n, and then use that table as a lookup for your own n! function. (The lookup table could be closed, so it would not be visible.)
See example here:
Thank you so very much! This has been very usefull. I had to shorten my x’s values, but that doesn´t make any difference to what I´m aiming
Hi, Bill:
I´m glad to hear about you! Thanks so very much; I guess that will be usefull. In the mean time, Dan Damelin above just gave me a very good solution for the work in progress.
I hope to see you in Rosario on September. Take care.
I dug around a bit and found that CODAP already has a combinations(n,k) function. But you asked for permutations, so perhaps that is no help.
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