@stdlib/stats
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Standard library statistical functions.
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{{alias}}( x, μ, b )
Evaluates the logarithm of the probability density function (PDF) for a
Laplace distribution with scale parameter `b` and location parameter `μ` at
a value `x`.
If provided `NaN` as any argument, the function returns `NaN`.
If provided `b <= 0`, the function returns `NaN`.
Parameters
----------
x: number
Input value.
μ: number
Location parameter.
b: number
Scale parameter.
Returns
-------
out: number
Evaluated logPDF.
Examples
--------
> var y = {{alias}}( 2.0, 0.0, 1.0 )
~-2.693
> y = {{alias}}( -1.0, 2.0, 3.0 )
~-2.792
> y = {{alias}}( 2.5, 2.0, 3.0 )
~-1.958
> y = {{alias}}( NaN, 0.0, 1.0 )
NaN
> y = {{alias}}( 0.0, NaN, 1.0 )
NaN
> y = {{alias}}( 0.0, 0.0, NaN )
NaN
// Negative scale parameter:
> y = {{alias}}( 2.0, 0.0, -1.0 )
NaN
{{alias}}.factory( μ, b )
Returns a function for evaluating the logarithm of the probability density
function (PDF) of a Laplace distribution with scale parameter `b` and
location parameter `μ`.
Parameters
----------
μ: number
Location parameter.
b: number
Scale parameter.
Returns
-------
logpdf: Function
Logarithm of probability density function (PDF).
Examples
--------
> var mylogPDF = {{alias}}.factory( 10.0, 2.0 );
> var y = mylogPDF( 10.0 )
~-1.386
See Also
--------