20.6.2 /COMPUTE

[ADVANCED\]MAP_POLAR GenericBegin [GenericEnd] [/COMPUTE [Threshold]]

Compute the Polarization Fraction image 'GenericBegin'"-P"'.Type', and the Polarization Angle image 'GenericBegin'"-A"'GenericEnd" from the 'GenericName'"-K"'GenericEnd' images where -K is all of the -I, -Q, and -U Stokes images.

The derivation is only made on pixels that are brighter than Threshold sigma in the Stokes I image. The use of the /COMPUTE option reset all parameters that control further display to their default values.