repl.txt (1509B)
1 2 {{alias}}( x, μ, b ) 3 Evaluates the logarithm of the probability density function (PDF) for a 4 Laplace distribution with scale parameter `b` and location parameter `μ` at 5 a value `x`. 6 7 If provided `NaN` as any argument, the function returns `NaN`. 8 9 If provided `b <= 0`, the function returns `NaN`. 10 11 Parameters 12 ---------- 13 x: number 14 Input value. 15 16 μ: number 17 Location parameter. 18 19 b: number 20 Scale parameter. 21 22 Returns 23 ------- 24 out: number 25 Evaluated logPDF. 26 27 Examples 28 -------- 29 > var y = {{alias}}( 2.0, 0.0, 1.0 ) 30 ~-2.693 31 > y = {{alias}}( -1.0, 2.0, 3.0 ) 32 ~-2.792 33 > y = {{alias}}( 2.5, 2.0, 3.0 ) 34 ~-1.958 35 > y = {{alias}}( NaN, 0.0, 1.0 ) 36 NaN 37 > y = {{alias}}( 0.0, NaN, 1.0 ) 38 NaN 39 > y = {{alias}}( 0.0, 0.0, NaN ) 40 NaN 41 // Negative scale parameter: 42 > y = {{alias}}( 2.0, 0.0, -1.0 ) 43 NaN 44 45 46 {{alias}}.factory( μ, b ) 47 Returns a function for evaluating the logarithm of the probability density 48 function (PDF) of a Laplace distribution with scale parameter `b` and 49 location parameter `μ`. 50 51 Parameters 52 ---------- 53 μ: number 54 Location parameter. 55 56 b: number 57 Scale parameter. 58 59 Returns 60 ------- 61 logpdf: Function 62 Logarithm of probability density function (PDF). 63 64 Examples 65 -------- 66 > var mylogPDF = {{alias}}.factory( 10.0, 2.0 ); 67 > var y = mylogPDF( 10.0 ) 68 ~-1.386 69 70 See Also 71 -------- 72