CCfits - HEASARC - NASA

24.38 CCfits::Keyword Class Reference 123
scribed in section 4.7 Data Scaling of the CFITSIO manual. For table extensions this
function does nothing.
WARNING: If the image contains integer-type data (as indicated by the bitpix() return
value), the new scale and zero value combination must not be such that the scaled
data would require a floating-point type (this uses the CFITSIO function fits_get_img-
_equivtype to make the determination). If this situation occurs, the function will throw
a FitsException.
Reimplemented from CCfits::HDU.
24.37.2.3 template void CCfits::ImageExt< T >::zero ( double value )
[virtual]
set the BZERO keyword value for images (see warning for images of int type)
For primary HDUs and image extensions, this will add (or update) the BZERO keyword
in the header. The new setting will affect future image array read/writes as described
in section 4.7 Data Scaling of the CFITSIO manual. For table extensions this function
does nothing.
WARNING: If the image contains integer-type data (as indicated by the bitpix() return
value), the new scale and zero value combination must not be such that the scaled
data would require a floating-point type (this uses the CFITSIO function fits_get_img-
_equivtype to make the determination). If this situation occurs, the function will throw
a FitsException.
Reimplemented from CCfits::HDU.
The documentation for this class was generated from the following file:
• ImageExt.h
24.38 CCfits::Keyword Class Reference
Abstract base class defining the interface for Keyword objects.
#include
Inherited by CCfits::KeyData< T >.
Public Member Functions
• virtual ∼Keyword ()
virtual destructor
• virtual Keyword ∗ clone () const =0
virtual copy constructor
• const String & comment () const
Generated on Tue Dec 6 2011 16:12:51 for CCfits by Doxygen