CCfits - HEASARC - NASA

24.12 CCfits::ExtHDU Class Reference 79
Parameters
first a vector representing an n-tuple giving the coordinates in the
image of the first pixel.
24.12.3.13 template void CCfits::ExtHDU::read ( std::valarray< S > & image,
const std::vector< long > & firstVertex, const std::vector< long > & lastVertex,
const std::vector< long > & stride, S ∗ nullValue )
read an image subset into valarray image, processing null values
The image subset is defined by two vertices and a stride indicating the ’denseness’ of
the values to be picked in each dimension (a stride = (1,1,1,...) means picking every
pixel in every dimension, whereas stride = (2,2,2,...) means picking every other value
in each dimension.
24.12.3.14 static void CCfits::ExtHDU::readHduName ( const fitsfile ∗ fptr, int hduIndex, String
& hduName, int & hduVersion ) [static]
read extension name.
Used primarily to allow extensions to be specified by HDU number and provide their
name for the associative array that contains them. Alternatively, if there is no name
keyword in the extension, one is synthesized from the index.
24.12.3.15 long CCfits::ExtHDU::rows ( ) const [virtual]
return the number of rows in the extension.
Exceptions
WrongExtensionType thrown if ∗this is an image extension.
Reimplemented in CCfits::Table.
24.12.3.16 template void CCfits::ExtHDU::write ( const std::vector< long > &
first, long nElements, const std::valarray< S > & data, S ∗ nullValue )
Write a set of pixels to an image extension with the first pixel specified by an n-tuple,
processing undefined data.
All the overloaded versions of ExtHDU::write perform operations on ∗this if it is an
image and throw a WrongExtensionType exception if not. Where appropriate, alternate
versions allow undefined data to be processed
Parameters
first an n-tuple of dimension equal to the image dimension specifying the
first pixel in the range to be written
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