scipy.special.log_ndtr¶

scipy.special.log_ndtr(x) = <ufunc 'log_ndtr'>¶

Logarithm of Gaussian cumulative distribution function.

Returns the log of the area under the standard Gaussian probability density function, integrated from minus infinity to x:

log(1/sqrt(2*pi) * integral(exp(-t**2 / 2), t=-inf..x))

Parameters:	x : array_like, real or complex Argument
Returns:	ndarray The value of the log of the normal CDF evaluated at x