@stdlib/stats
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Standard library statistical functions.
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{{alias}}( x, k, λ )
Evaluates the logarithm of the cumulative distribution function (CDF) 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 logCDF.
Examples
--------
> var y = {{alias}}( 2.0, 1.0, 1.0 )
~-0.145
> y = {{alias}}( -1.0, 2.0, 2.0 )
-Infinity
> y = {{alias}}( {{alias:/constants/float64/pinf}}, 4.0, 2.0 )
0.0
> y = {{alias}}( {{alias:/constants/float64/ninf}}, 4.0, 2.0 )
-Infinity
> y = {{alias}}( NaN, 0.0, 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 cumulative
distribution function (CDF) of a Weibull distribution with scale parameter
`λ` and shape parameter `k`.
Parameters
----------
k: number
Shape parameter.
λ: number
Scale parameter.
Returns
-------
logcdf: Function
Logarithm of cumulative distribution function (CDF).
Examples
--------
> var mylogcdf = {{alias}}.factory( 2.0, 10.0 );
> var y = mylogcdf( 12.0 )
~-0.27
See Also
--------