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Unwrap Angles To Absolute Angles Above Two Pie
Syntax r = unwrap(a)
r = unwrap(a, b)
r = unwrap(a, b, d)
See Also mod , colunmod

Description
Returns a double-precision matrix r with the same dimensions as x that unwraps to equivalent angles with absolute value greater than 2 pi.

If the argument b is not present or if it is an empty matrix, the value pi is used in its place. If the argument b is present, it must be an integer, real or double-precision scalar greater than zero. The return value r satisfies the following properties:
     ( R   - X   ) / (2 pi) 
        k     k 
is equal to an integer and
     | R   -  R   |  < 2 pi
        k+1    k    
furthermore
     if X     -  X    > +b   then R    -  R     < 0
         k+1      k                k+1      k

     if X     -  X    < -b   then R    -  R     > 0
         k+1      k                k+1      k

where X and R depend on x and d as follows
d x X R
not present a row vector equal x equal r not present not a row vector any column of x any column of r equal 1 any value any column of x any column of r equal 2 any value any row of x any row of r

Example
If you enter
     x = 2 * seq(5)
     y = 2 * PI
     x = mod(x, y)
     print x
 O-Matrix will respond
     {
     2
     4
     6
     1.71681
     3.71681
     }
 If you continue by entering
     x = unwrap(x) 
     print x
 O-Matrix will respond
     {
     2
     4
     6
     8
     10
     }