Re: RandomArray from user defined distribution?
- To: mathgroup at smc.vnet.net
- Subject: [mg73341] Re: [mg73319] RandomArray from user defined distribution?
- From: Stern <nycstern at gmail.com>
- Date: Tue, 13 Feb 2007 06:55:56 -0500 (EST)
- References: <200702121001.FAA14898@smc.vnet.net>
Poisson distributions are not defined by their sigmas; they are defined by their means alone. Though one could calculate the standard deviation for any given mean, it should always be the same and therefore uninteresting. I welcome a statistical guru to correct me in this if appropriate. A random array of 50 numbers in a Poisson distribution with mean 10 can be generated in Mathematica as follows: In[1]:= <<Statistics`DiscreteDistributions` In[2]:= RandomArray[PoissonDistribution[10],50] Done. On 2/12/07, rob <robIV at piovere.com> wrote: > I'd like to use the RandomArray to produce some data from > what I think is a Poisson distribution in t > P[t] = a^2 t Exp[-a*t] where a is mean, sigma. > > I see one can use RandomArray to produce sample data from a > lot of continuous distributions but the Poisson isn't among > them (it's only available in the discrete form). > > I've made a bunch of crippled attempts to force my P[t] to > put out examples but have failed. Any suggestions? Thanks. > >
- References:
- RandomArray from user defined distribution?
- From: rob <robIV@piovere.com>
- RandomArray from user defined distribution?