[SciPy-user] phase wrapping algorithm

Travis Oliphant oliphant.travis at ieee.org
Tue Oct 10 13:35:39 CDT 2006

Ryan Krauss wrote:
> I am rethinking an algorithm for unwrapping phase data from arctan2
> for a vector of complex numbers (coming from lti models of feedback
> control systems).  I had written something a while ago using weave,
> but my old code causes seg faults with a recent scipy update.  So, I
> am rethinking the algorithm.

There is already a phase unwrapping algorithm in NumPy for 1-d data 
called unwrap.

numpy.unwrap(b) seems to work fine on the second column of the data you 



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