truncate function of Gaussian seems not work

[universewill]

i use truncate function of Gaussian in bases-scala, but it seems not working
the code:

val truncGaussian = dk.bayes.math.gaussian.Gaussian(0.5, 1).truncate(0.0, true)
for(i<- 0 until 300000){
val d = truncGaussian.draw
println(d)
}

i plot the hist of sampled data draw from truncGaussian, and it is a Gaussian distribution with no truncation

[danielkorzekwa]

Gaussian().truncate() gives you the moments (mean and variance) of a truncated Gaussian, so then you just sample from a new Gaussian that approximates truncated Gaussian by moment matching.