CCfits - HEASARC - NASA

24.14 CCfits::FITS Class Reference 92
Force deallocation and erase of elements of a FITS memory object. Allows a reset of
everything inside the FITS object, and closes the file. The object is inaccessible after
this call.
destroy is public to allow users to reuse a symbol for a new file, but it is identical in
operation to the destructor.
24.14.3.8 const std::multimap< std::String, ExtHDU ∗ > & CCfits::FITS::extension ( ) const
return const reference to the extension container
This is useful for such operations as extension().size() etc.
24.14.3.9 Table & CCfits::FITS::filter ( const String & expression, ExtHDU & inputTable,
bool overwrite = true, bool readData = false )
Filter the rows of the inputTable with the condition expression, and return a reference
to the resulting Table.
This function provides an object oriented version of cfitsio’s fits_select_rows call. The
expression string is any boolean expression involving the names of the columns in the
input table (e.g., if there were a column called "density", a valid expression might be
"DENSITY > 3.5": see the cfitsio documentation for further details).
[N.B. the "append" functionality described below does not work when linked with
cfitsio 2.202 or prior because of a known issue with that version of the library. This
causes the output to be a new extension with a correct header copy and version number
but without the filtered data]. If the inputTable is an Extension HDU of this FITS
object, then if overwrite is true the operation will overwrite the inputTable with the
filtered version, otherwise it will append a new HDU with the same extension name
but the next highest version (EXTVER) number available.
24.14.3.10 void CCfits::FITS::flush ( )
flush buffer contents to disk
Provides manual control of disk writing operation. Image data are flushed automatically
to disk after the write operation is completed, but not column data.
24.14.3.11 void CCfits::FITS::getTileDimensions ( std::vector< long > & tileSizes ) const
Get the current settings of dimension sizes for tiles used in image compression.
Parameters
tileSizes A vector to be filled with cfitsio’s current tile dimension settings. C-
Cfits will resize this vector to contain the proper number of values.
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