function r2d, rads
 ;+
 ; NAME:
 ;     r2d
 ;
 ; PURPOSE:
 ;     convert radians to degrees using the fewest characters
 ;     typed on the command line. this function is for lazy
 ;     typists.
 ;
 ; INPUTS:
 ;     rads - angle in radians.
 ;
 ; OUTPUTS:
 ;     the angle in degrees. output type is always double.
 ;
 ; EXAMPLE:
 ;     angle = r2d(3.14159 / 2)
 ;
 ; MODIFICATION HISTORY:
 ;     written 2005-11-11 by mikewong
 ;-

return, rads*180d/!dpi
end