repl.txt (678B)
1 2 {{alias}}( r, p ) 3 Returns the variance of a negative binomial distribution. 4 5 If provided `NaN` as any argument, the function returns `NaN`. 6 7 If provided a `r` which is not a positive number, the function returns 8 `NaN`. 9 10 If provided a success probability `p` outside of `[0,1]`, the function 11 returns `NaN`. 12 13 Parameters 14 ---------- 15 r: integer 16 Number of failures until experiment is stopped. 17 18 p: number 19 Success probability. 20 21 Returns 22 ------- 23 out: number 24 Variance. 25 26 Examples 27 -------- 28 > var v = {{alias}}( 100, 0.2 ) 29 2000.0 30 > v = {{alias}}( 20, 0.5 ) 31 40.0 32 33 See Also 34 -------- 35