Q = unwrap(P,cutoff)Q = unwrap(P)
Q = unwrap(P,cutoff) corrects the phase angles in vector or matrix P by adding multiples of ±2¶, when absolute jumps are greater than cutoff, to smooth the transitions across branch cuts. When P is a matrix, the phase angles are corrected down each column. The phase must be in radians.
Q = unwrap(P) uses the default value for cutoff, pi .
unwrap does the best it can to detect branch cut crossings, but it can be fooled by sparse, rapidly changing phase values.
abs,angle
(c) Copyright 1994 by The MathWorks, Inc.