Normally distributed random variables on Ruby on Rails

Question

I've been looking on Google/stackoverflow for a couple of hours and I can't find a way (or even a gem) to generate normally distributed random variables using ruby on rails. It's a bit frustrating..! Any idea ?

possible duplicate of [Code to generate Gaussian (normally distributed) random numbers in Ruby](http://stackoverflow.com/questions/5825680/code-to-generate-gaussian-normally-distributed-random-numbers-in-ruby) — Oliver Charlesworth, Aug 20 '13 at 22:28

score 2 · Accepted Answer · edited May 23 '17 at 11:46

Thanks for the help in comments. Oli is right, I found the answer in that answer :

https://stackoverflow.com/a/8205982/2576033

Using rubystats gem - "a port of the statistics libraries from PHPMath" (pure ruby), you can generate normally distributed variables, easily and in a nice way :

gen = Rubystats::NormalDistribution.new(mean, sd)
gen.rng               # a single random sample
gen.rng(100)          # 100 random samples

Normally distributed random variables on Ruby on Rails

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