Sample

[saromanov]

Hi!
I just added getting samples from slice and it looks so:

import (
"stats"
)

func main(){
//getting samples from slice without replacement
stats.Sample([]float64{0.1,0.2,0.3,0.4}, 3, false) // [0.2,0.1,0.4]

//or getting samples with replacement
stats.Sample([]float64{0.1,0.2,0.3,0.4}, 30, true) // [0.2,0.2,0.4,0.3]...
}

What do you think(if someone alive here:)

[montanaflynn]

Looks great, thanks for the contribution!