repl.txt (746B)
1 2 {{alias}}( α, β ) 3 Returns the standard deviation of a beta distribution. 4 5 If `α <= 0` or `β <= 0`, the function returns `NaN`. 6 7 If `α` or `β` is `NaN`, the function returns `NaN`. 8 9 Parameters 10 ---------- 11 α: number 12 First shape parameter. 13 14 β: number 15 Second shape parameter. 16 17 Returns 18 ------- 19 out: number 20 Standard deviation. 21 22 Examples 23 -------- 24 > var v = {{alias}}( 1.0, 1.0 ) 25 ~0.289 26 > v = {{alias}}( 4.0, 12.0 ) 27 ~0.105 28 > v = {{alias}}( 8.0, 2.0 ) 29 ~0.121 30 31 > v = {{alias}}( 1.0, -0.1 ) 32 NaN 33 > v = {{alias}}( -0.1, 1.0 ) 34 NaN 35 36 > v = {{alias}}( 2.0, NaN ) 37 NaN 38 > v = {{alias}}( NaN, 2.0 ) 39 NaN 40 41 See Also 42 -------- 43