scipy.special.erfcinv¶
-
scipy.special.
erfcinv
(x, /, out=None, *, where=True, casting='same_kind', order='K', dtype=None, subok=True[, signature, extobj]) = <ufunc 'erfcinv'>¶ Inverse of the complementary error function.
Computes the inverse of the complementary error function.
In the complex domain, there is no unique complex number w satisfying erfc(w)=z. This indicates a true inverse function would have multi-value. When the domain restricts to the real, 0 < x < 2, there is a unique real number satisfying erfc(erfcinv(x)) = erfcinv(erfc(x)).
It is related to inverse of the error function by erfcinv(1-x) = erfinv(x)
- Parameters
- yndarray
Argument at which to evaluate. Domain: [0, 2]
- Returns
- erfcinvndarray
The inverse of erfc of y, element-wise
See also
Examples
evaluating a float number
>>> from scipy import special >>> special.erfcinv(0.5) 0.4769362762044698
evaluating an ndarray
>>> from scipy import special >>> y = np.linspace(0.0, 2.0, num=11) >>> special.erfcinv(y) array([ inf, 0.9061938 , 0.59511608, 0.37080716, 0.17914345, -0. , -0.17914345, -0.37080716, -0.59511608, -0.9061938 , -inf])