@stdlib/stats
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Standard library statistical functions.
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{{alias}}( x, k, λ )
Evaluates the logarithm of the probability density function (PDF) for a
Weibull distribution with shape parameter `k` and scale parameter `λ` at a
value `x`.
If provided `NaN` as any argument, the function returns `NaN`.
If provided a nonpositive value for `λ` or `k`, the function returns `NaN`.
Parameters
----------
x: number
Input value.
k: number
Shape parameter.
λ: number
Scale parameter.
Returns
-------
out: number
Evaluated logPDF.
Examples
--------
> var y = {{alias}}( 2.0, 1.0, 0.5 )
~-3.307
> y = {{alias}}( 0.1, 1.0, 1.0 )
~-0.1
> y = {{alias}}( -1.0, 4.0, 2.0 )
-Infinity
> y = {{alias}}( NaN, 0.6, 1.0 )
NaN
> y = {{alias}}( 0.0, NaN, 1.0 )
NaN
> y = {{alias}}( 0.0, 0.0, NaN )
NaN
> y = {{alias}}( 2.0, 0.0, -1.0 )
NaN
{{alias}}.factory( k, λ )
Returns a function for evaluating the logarithm of the probability density
function (PDF) of a Weibull distribution with shape parameter `k` and scale
parameter `λ`.
Parameters
----------
k: number
Shape parameter.
λ: number
Scale parameter.
Returns
-------
logpdf: Function
Logarithm of probability density function (PDF).
Examples
--------
> var mylofpdf = {{alias}}.factory( 7.0, 6.0 );
> y = mylofpdf( 7.0 )
~-1.863
See Also
--------