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z | |< || _ | S )a� Variance of the Tukey Lambda distribution.
Parameters
----------
lam : array_like
The lambda values at which to compute the variance.
Returns
-------
v : ndarray
The variance. For lam < -0.5, the variance is not defined, so
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Notes
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In an interval around lambda=0, this function uses the [4,4] Pade
approximation to compute the variance. Otherwise it uses the standard
formula (https://en.wikipedia.org/wiki/Tukey_lambda_distribution). The
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results near lambda = 0.
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Parameters
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lam : array_like
The lambda values at which to compute the variance.
Returns
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v : ndarray
The variance. For lam < -0.25, the variance is not defined, so
np.nan is returned. For lam = 0.25, np.inf is returned.
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