Re: unwrap modulo 2pi

[Dave Greenwood <greenwoodde(at)ornl.gov>]

graham_wilson@my-deja.com wrote:
> My appologies for not being explicit enough...
>  
> IDL> a=[2,4,6,8,10,12]
> IDL> a=[2.,4.,6.,8.,10.,12.]
> IDL> b=2*!PI
> IDL> c=a mod b
> IDL> print, c
>       2.00000  4.00000   6.00000   1.71681  3.71681   5.71681
>  
> What I mean by 'unwraping' is: Given I know 'c' and 'b' how do I
> explicitly find a?

Surely I must be missing something(?):

 IDL> print, c + fix(a/b)*b
      2.00000      4.00000      6.00000      8.00000      10.0000      12.0000

Dave
--------------
Dave Greenwood                Email: Greenwoodde@ORNL.GOV
Oak Ridge National Lab        %STD-W-DISCLAIMER, I only speak for myself