cs_safe.py#

collection of complex-step safe functions to replace standard numpy operations.

openmdao.utils.cs_safe.abs(x)[source]

Complex-step safe version of numpy.abs function.

Parameters:
xndarray

Array value to be computed on.

Returns:
ndarray

Absolute value.

openmdao.utils.cs_safe.arctan2(y, x)[source]

Numpy-compatible, complex-compatible arctan2 function for use with complex-step.

Parameters:
yfloat or complex

The length of the side opposite the angle being determined.

xfloat or complex

The length of the side adjacent to the angle being determined.

Returns:
ndarray

The angle whose opposite side has length y and whose adjacent side has length x.

openmdao.utils.cs_safe.norm(x, axis=None)[source]

Complex-step safe version of numpy.linalg.norm function.

Parameters:
xndarray

Array value to be computed on.

axisNone or int

Axis to perform the norm up to.

Returns:
ndarray

Matrix or vector norm.