numpy.unwrap — NumPy v1.11 Manual (original) (raw)
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: | p : array_like Input array. discont : float, optional Maximum discontinuity between values, default is pi. axis : int, optional Axis along which unwrap will operate, default is the last axis. |
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| Returns: | out : ndarray Output array. |
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]) np.unwrap(phase) array([ 0. , 0.78539816, 1.57079633, -0.78539816, 0. ])