@stdlib/stats
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Standard library statistical functions.
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{{alias}}( x, μ, s )
Evaluates the cumulative distribution function (CDF) for a logistic
distribution with location parameter `μ` and scale parameter `s` at a value
`x`.
If provided `NaN` as any argument, the function returns `NaN`.
If provided `s < 0`, the function returns `NaN`.
Parameters
----------
x: number
Input value.
μ: number
Location parameter.
s: number
Scale parameter.
Returns
-------
out: number
Evaluated CDF.
Examples
--------
> var y = {{alias}}( 2.0, 0.0, 1.0 )
~0.881
> y = {{alias}}( 5.0, 10.0, 3.0 )
~0.159
> y = {{alias}}( 2.0, 0.0, NaN )
NaN
> y = {{alias}}( 2.0, NaN, 1.0 )
NaN
> y = {{alias}}( NaN, 0.0, 1.0 )
NaN
// Degenerate distribution centered at `μ` when `s = 0.0`:
> y = {{alias}}( 2.0, 8.0, 0.0 )
0.0
> y = {{alias}}( 8.0, 8.0, 0.0 )
1.0
> y = {{alias}}( 10.0, 8.0, 0.0 )
1.0
{{alias}}.factory( μ, s )
Returns a function for evaluating the cumulative distribution function (CDF)
of a logistic distribution with location parameter `μ` and scale parameter
`s`.
Parameters
----------
μ: number
Location parameter.
s: number
Scale parameter.
Returns
-------
cdf: Function
Cumulative distribution function (CDF).
Examples
--------
> var mycdf = {{alias}}.factory( 3.0, 1.5 );
> var y = mycdf( 1.0 )
~0.209
See Also
--------