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WRAP

WRAP

Purpose


  This function wraps one or more values into the range [0,
  range). If the values are positive, this function is identical to
  the mod operator. Any negative values compute to (value mod range)
  + range.

Category


  Utilities

Calling Sequence


  result = wrap(value, range)

Inputs


  value: One or more values
  range: A positive scalar which sets the top of the wrapped
  coordinate system.

Outputs


  Multiples of range are added to value to bring it in the range [0,
  range)

Example


  Wrap 420 degrees into the range 0 - 360 degrees:
  IDL> result = wrap(720, 360)
  IDL> print, result
        60
  IDL> print, wrap(-1, 360)
      359

Modification History


  March 2009: Written by Chris Beaumont



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