RESCALE-Rescale using user-defined upper and lower limits

Description:

This task rescales spectra/images using user-defined upper and lower limits. The scaling is such that the interval [LOWFACT,HIGHFACT] becomes the interval [0,1]. The "limits" are not thresholds, i.e. data values beyond the limits are also scaled.

Parameters:

IMAGE

Name of image to be rescaled.

LOWFACT

lower limit of rescaling.

HIGHFACT

upper limit of rescaling.

OUTPUT

Name of resulting image.

Source comments:

 R E S C A L E

 This routine rescales spectra/images using user-defined upper and
 lower limits. The scaling is such that the interval
 [LOWFACT,HIGHFACT] becomes the interval [0,1]. The "limits" are
 not thresholds, i.e. data values beyond the limits are also
 scaled.

 Command parameters -

 IMAGE  (Character) The name of the structure containing the image.
        Uses main data array, or the x-axis data for the XCxxx routines.

 LOWFAC (Numeric) The lower limit of the rescaling.

 HIGHFAC (Numeric) The upper limit of the rescaling.

 OUTPUT (Character) The name of the result of the operation.  This
        can be the same as for IMAGE.  If not, a new structure
        is created, with everything but the data a direct
        copy of the input.

 02-MAY-1992  MAS (UoM): Original version.