wrap phase

[weitong]

Labview 7.1

       It has the functiong for unwrapping phase.

       But, now, I need to convert an array of phase data to range -180 deg and 180deg (wrap?).  Is there any way to do that easily or any algorithm?

Thanks.

Weitong

[PhillipBrooks]

You can use the Quotient & Remainder function. using a for loop, let x = your array element and y = 360. The Remainder will be your wrapped phase ( 0 - 360 ). Add -180 to your remainder.

Message Edited by Phillip Brooks on 04-09-2008 07:55 AM

[TWGomez]

I had to do the same thing a few years ago...basically I wrote my own function in a formula node. That code now belongs to the people that hired me for the task, so I don't have the code to send you, but it was a pretty simply

 int32 y;

if (x >180)

     y = x -180;

else if (x < -180);

     y = x +180;

else

    y = x;

[weitong]

Thanks.