`astropy.io.fits.hdu.image:_ImageBaseHDU._scale_internal`

source: /astropy/io/fits/hdu/image.py :482

Signature

   def     _scale_internal (    self    ,    type    =  None   ,    option    =  old   ,    bscale    =  None   ,    bzero    =  None   ,    blank    =  0     )

Summary

This is an internal implementation of the scale method, which also supports handling BLANK properly.

Extended Summary

TODO: This is only needed for fixing #3865 without introducing any public API changes. We should support BLANK better when rescaling data, and when that is added the need for this internal interface should go away.

Note: the default of blank=0 merely reflects the current behavior, and is not necessarily a deliberate choice (better would be to disallow conversion of floats to ints without specifying a BLANK if there are NaN/inf values).

Aliases

astropy.io.fits.hdu.image._ImageBaseHDU._scale_internal