`scipy.optimize._numdiff:_compute_absolute_step`

source: /scipy/optimize/_numdiff.py :147

Signature

def _compute_absolute_step ( rel_step , x0 , f0 , method )

Summary

Computes an absolute step from a relative step for finite difference calculation.

Parameters

rel_step: None or array-like: Relative step for the finite difference calculation
x0 : np.ndarray: Parameter vector
f0 : np.ndarray or scalar
method : {'2-point', '3-point', 'cs'}

Returns

h : float: The absolute step size

Notes

h will always be np.float64. However, if x0 or f0 are smaller floating point dtypes (e.g. np.float32), then the absolute step size will be calculated from the smallest floating point size.

Aliases

scipy.optimize._numdiff._compute_absolute_step