@stdlib/stats
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Standard library statistical functions.
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{{alias}}( p, λ )
Evaluates the quantile function for an exponential distribution with rate
parameter `λ` at a probability `p`.
If `p < 0` or `p > 1`, the function returns `NaN`.
If provided `NaN` as any argument, the function returns `NaN`.
If provided a negative value for `λ`, the function returns `NaN`.
Parameters
----------
p: number
Input probability.
λ: number
Rate parameter.
Returns
-------
out: number
Evaluated quantile function.
Examples
--------
> var y = {{alias}}( 0.8, 1.0 )
~1.609
> y = {{alias}}( 0.5, 4.0 )
~0.173
> y = {{alias}}( 0.5, 0.1 )
~6.931
> y = {{alias}}( -0.2, 0.1 )
NaN
> y = {{alias}}( NaN, 1.0 )
NaN
> y = {{alias}}( 0.0, NaN )
NaN
// Negative rate parameter:
> y = {{alias}}( 0.5, -1.0 )
NaN
{{alias}}.factory( λ )
Returns a function for evaluating the quantile function for an exponential
distribution with rate parameter `λ`.
Parameters
----------
λ: number
Rate parameter.
Returns
-------
quantile: Function
Quantile function.
Examples
--------
> var myQuantile = {{alias}}.factory( 0.4 );
> var y = myQuantile( 0.4 )
~1.277
> y = myQuantile( 1.0 )
Infinity
See Also
--------