Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.


dpb
Posts:
9,602
Registered:
6/7/07


Re: how to generate a gaussian distribution using random number generator
Posted:
Jul 3, 2013 8:48 PM


On 7/3/2013 6:52 PM, faraz.a wrote: > i want to generate 50,000 samples according to the gaussian distribution > using random number generator where sigma=1 and mean=0 X is a normally > distributed random variable N(0,?2). mean=0 variance=1 > > I did this R=randn(50000) > > i got an error > > Error using randn > Out of memory. Type HELP MEMORY for your options.
doc randn
You tried to generate 50K x 50K array which is ~19 GB
> and if i am using R=randn(50000,1); > hist(R) > > this generated a distribution but the y label was ranging from 4 to 5. > I want it from infinity to +infinity > how to do that?
What's the probability of getting either extreme from a sample from a standard normal distribution?
For that matter, what's the probability of z>5? How does that compare w/ the size of the sample generated?




