scipy.special.log1p#
- scipy.special.log1p(x, out=None) = <ufunc 'log1p'>#
- Calculates log(1 + x) for use when x is near zero. - Parameters:
- xarray_like
- Real or complex valued input. 
- outndarray, optional
- Optional output array for the function results. 
 
- Returns:
- scalar or ndarray
- Values of - log(1 + x).
 
 - Examples - >>> import numpy as np >>> import scipy.special as sc - It is more accurate than using - log(1 + x)directly for- xnear 0. Note that in the below example- 1 + 1e-17 == 1to double precision.- >>> sc.log1p(1e-17) 1e-17 >>> np.log(1 + 1e-17) 0.0