how to generate random numbers that satisfy certain distribution
in [Python]
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From: thinke365 on 23 Jan 2010 12:37 such as uniform distribution, Normal distribution or poisson distribution. is there any package that can be used to generate such random numbers. -- View this message in context: http://old.nabble.com/how-to-generate-random-numbers-that-satisfy-certain-distribution-tp27288180p27288180.html Sent from the Python - python-list mailing list archive at Nabble.com.
From: Ravi on 23 Jan 2010 13:51 On Jan 23, 10:37 pm, thinke365 <thinke...(a)gmail.com> wrote: > such as uniform distribution, Normal distribution or poisson distribution.. > is there any package that can be used to generate such random numbers. > > -- > View this message in context:http://old.nabble.com/how-to-generate-random-numbers-that-satisfy-cer... > Sent from the Python - python-list mailing list archive at Nabble.com. Did you try random package?
From: thinke365 on 23 Jan 2010 14:10 Bugzilla from ra.ravi.rav(a)gmail.com wrote: > > On Jan 23, 10:37Â pm, thinke365 <thinke...(a)gmail.com> wrote: >> such as uniform distribution, Normal distribution or poisson >> distribution. >> is there any package that can be used to generate such random numbers. >> >> -- >> View this message in >> context:http://old.nabble.com/how-to-generate-random-numbers-that-satisfy-cer... >> Sent from the Python - python-list mailing list archive at Nabble.com. > > Did you try random package? > -- > http://mail.python.org/mailman/listinfo/python-list > > of course i have tried random package, but can this package generate random sequence that satisfy possion distribution , normal distribution and uniform distribution -- View this message in context: http://old.nabble.com/how-to-generate-random-numbers-that-satisfy-certain-distribution-tp27288180p27288996.html Sent from the Python - python-list mailing list archive at Nabble.com.
From: Peter Chant on 23 Jan 2010 14:17 thinke365 wrote: > > such as uniform distribution, Normal distribution or poisson distribution. > is there any package that can be used to generate such random numbers. > I remeber being told that adding up 12 random numbers in the range 0-1 (which is what most computer random number genertors at the time chucked out) and subtracted 6 gives a pretty good normal distribution. I think I did try it once and it failed, but I must have done something odd. -- http://www.petezilla.co.uk
From: Arnaud Delobelle on 23 Jan 2010 14:57
thinke365 <thinke365(a)gmail.com> writes: > such as uniform distribution, Normal distribution or poisson distribution. > is there any package that can be used to generate such random numbers. It's all in the standard library, the module is called -surprisingly- 'random'. - use random.uniform for the uniform distributions - use random normalvariate for normal distributions There isn't a Poisson distribution function, but there is a expovariate function. I think you can get poisson like this, but take it with a grain of salt because my probability skills are very rusty! import random import itertools def poisson(l): e = random.expovariate acc = 0.0 for n in itertools.count(): acc += e(l) if acc >= 1.0: return n -- Arnaud |