repl.txt (947B)
1 2 {{alias}}( α, s, m ) 3 Returns the standard deviation of a Fréchet distribution with shape 4 parameter `α`, scale parameter `s`, and location `m`. 5 6 If provided `0 < α <= 2` and `s > 0`, the function returns positive 7 infinity. 8 9 If provided `NaN` as any argument, the function returns `NaN`. 10 11 If provided `α <= 0` or `s <= 0`, the function returns `NaN`. 12 13 Parameters 14 ---------- 15 α: number 16 Shape parameter. 17 18 s: number 19 Scale parameter. 20 21 m: number 22 Location parameter. 23 24 Returns 25 ------- 26 out: number 27 Standard deviation. 28 29 Examples 30 -------- 31 > var y = {{alias}}( 4.0, 2.0, 1.0 ) 32 ~1.041 33 > var y = {{alias}}( 4.0, 2.0, -3.0 ) 34 ~1.041 35 > y = {{alias}}( 0.5, 2.0, 1.0 ) 36 Infinity 37 > y = {{alias}}( NaN, 1.0, 0.0 ) 38 NaN 39 > y = {{alias}}( 1.0, NaN, 0.0 ) 40 NaN 41 > y = {{alias}}( 1.0, 1.0, NaN ) 42 NaN 43 44 See Also 45 -------- 46