The issue is that grandom doesn't work properly on integer types, since it 
makes a distribution with mean 0 and stddev 1.  It's a bit awkward, but you can 
use

 $vals = (grandom($n) * $stdev + $mean)->rint->byte

instead.


On Nov 11, 2013, at 8:59 AM, mraptor <[email protected]> wrote:

> Is there are way to generate random values based on Normal distribution.
> The same like rnorm() in R-language.
> 
>> round( rnorm(3,mean=2^n/2,sd=sqrt(2^n)/2) )
> [1] 524758 524540 524647
> 
> I see there is grandom() funtion, but it requires some sort of lib (ndtri) ?
> 
> pdl> p grandom(byte,1)
> 
> ndtri domain error
> [0]
> 
> 
> thanks
> 
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