Module « scipy.special »

Fonction inv_boxcox1p - module scipy.special

Signature de la fonction inv_boxcox1p

Description

inv_boxcox1p.__doc__

inv_boxcox1p(x1, x2, /, out=None, *, where=True, casting='same_kind', order='K', dtype=None, subok=True[, signature, extobj])

inv_boxcox1p(y, lmbda)

Compute the inverse of the Box-Cox transformation.

Find ``x`` such that::

    y = ((1+x)**lmbda - 1) / lmbda  if lmbda != 0
        log(1+x)                    if lmbda == 0

Parameters
----------
y : array_like
    Data to be transformed.
lmbda : array_like
    Power parameter of the Box-Cox transform.

Returns
-------
x : array
    Transformed data.

Notes
-----

.. versionadded:: 0.16.0

Examples
--------
>>> from scipy.special import boxcox1p, inv_boxcox1p
>>> y = boxcox1p([1, 4, 10], 2.5)
>>> inv_boxcox1p(y, 2.5)
array([1., 4., 10.])