| MATLAB Function Reference | Search Help Desk |
| unwrap | Examples See Also |
Q = unwrap(P) Q = unwrap(P,tol) Q = unwrap(P,[],dim) Q = unwrap(P,tol,dim)
Q = unwrap(P)
corrects the radian phase angles in array P by adding multiples of ±2
when absolute jumps between consecutive array elements are greater than radians. If P is a matrix, unwrap operates columnwise. If P is a multidimensional array, unwrap operates on the first nonsingleton dimension.
Q = unwrap(P,tol)
uses a jump tolerance tol instead of the default value, .
Q = unwrap(P,[],dim)
unwraps along dim using the default tolerance.
Q = unwrap(P,tol,dim)
uses a jump tolerance of tol.
Array P features smoothly increasing phase angles except for discontinuities at elements (3,1) and (1,2).
P =
0 7.0686 1.5708 2.3562
0.1963 0.9817 1.7671 2.5525
6.6759 1.1781 1.9635 2.7489
0.5890 1.3744 2.1598 2.9452
The function Q = unwrap(P) eliminates these discontinuities.
Q =
0 0.7854 1.5708 2.3562
0.1963 0.9817 1.7671 2.5525
0.3927 1.1781 1.9635 2.7489
0.5890 1.3744 2.1598 2.9452
The unwrap function detects branch cut crossings, but it can be fooled by sparse, rapidly changing phase values.
abs Absolute value and complex magnitude
angle Phase angle