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{{alias}}( k, λ )
Returns the standard deviation of an Erlang distribution.
If provided `NaN` as any argument, the function returns `NaN`.
If not provided a positive integer for `k`, the function returns `NaN`.
If provided a non-positive value for `λ`, the function returns `NaN`.
Parameters
----------
k: integer
Shape parameter.
λ: number
Rate parameter.
Returns
-------
out: number
Standard deviation.
Examples
--------
> var v = {{alias}}( 1, 1.0 )
1.0
> v = {{alias}}( 4, 12.0 )
~0.167
> v = {{alias}}( 8, 2.0 )
~1.414
See Also
--------
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