NumPy

numpy.unwrap

numpy.unwrap(p, discont=3.141592653589793, axis=-1)[source]

Unwrap by changing deltas between values to 2*pi complement.

Unwrap radian phase p by changing absolute jumps greater than discont to their 2*pi complement along the given axis.

Parameters
parray_like

Input array.

discontfloat, optional

Maximum discontinuity between values, default is pi.

axisint, optional

Axis along which unwrap will operate, default is the last axis.

Returns
outndarray

Output array.

See also

rad2deg, deg2rad

Notes

If the discontinuity in p is smaller than pi, but larger than discont, no unwrapping is done because taking the 2*pi complement would only make the discontinuity larger.

Examples

>>> phase = np.linspace(0, np.pi, num=5)
>>> phase[3:] += np.pi
>>> phase
array([ 0.        ,  0.78539816,  1.57079633,  5.49778714,  6.28318531]) # may vary
>>> np.unwrap(phase)
array([ 0.        ,  0.78539816,  1.57079633, -0.78539816,  0.        ]) # may vary

Previous topic

numpy.radians

Next topic

numpy.deg2rad