scipy.special.erfinv#
- scipy.special.erfinv(y, out=None) = <ufunc 'erfinv'>#
Inverse of the error function.
Computes the inverse of the error function.
In the complex domain, there is no unique complex number w satisfying erf(w)=z. This indicates a true inverse function would have multi-value. When the domain restricts to the real, -1 < x < 1, there is a unique real number satisfying erf(erfinv(x)) = x.
- Parameters
- yndarray
Argument at which to evaluate. Domain: [-1, 1]
- outndarray, optional
Optional output array for the function values
- Returns
- erfinvscalar or ndarray
The inverse of erf of y, element-wise)
See also
Examples
evaluating a float number
>>> from scipy import special >>> special.erfinv(0.5) 0.4769362762044698
evaluating an ndarray
>>> from scipy import special >>> y = np.linspace(-1.0, 1.0, num=10) >>> special.erfinv(y) array([ -inf, -0.86312307, -0.5407314 , -0.30457019, -0.0987901 , 0.0987901 , 0.30457019, 0.5407314 , 0.86312307, inf])