CCfits - HEASARC - NASA
CCfits - HEASARC - NASA
CCfits - HEASARC - NASA
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24.3 <strong>CCfits</strong>::Column Class Reference 54<br />
24.3.1 Detailed Description<br />
Abstract base class for Column objects.<br />
Columns are the data containers used in FITS tables. Columns of scalar type (one<br />
entry per cell) are implemented by the template subclass ColumnData. Columns<br />
of vector type (vector and variable rows) are implemented with the template subclass<br />
ColumnVectorData. AsciiTables may only contain Columns of type Column-<br />
Data, where T is an implemented FITS data type (see the <strong>CCfits</strong>.h header for a<br />
complete list. This requirement is enforced by ensuring that AsciiTable’s addColumn<br />
method may only create an AsciiTable compatible column. The ColumnData<br />
class stores its data in a std::vector object.<br />
BinTables may contain either ColumnData or ColumnVectorData. For -<br />
ColumnVectorData, T must be a numeric type: string vectors are handled by Column-<br />
Data; string arrays are not supported. The internal representation of the data is<br />
a std::vector object. The std::valarray class is designed for efficient<br />
numeric processing and has many vectorized numeric and transcendental functions<br />
defined on it.<br />
Member template functions for read/write operations are provided in multiple overloads<br />
as the interface to data operations. Implicit data type conversions are supported<br />
but where they are required make the operations less efficient. Reading numeric column<br />
data as character arrays, supported by cfitsio, is not supported by <strong>CCfits</strong>.<br />
As a base class, Column provides protected accessor/mutator inline functions to allow<br />
only its subclasses to access data members.<br />
24.3.2 Constructor & Destructor Documentation<br />
24.3.2.1 <strong>CCfits</strong>::Column::Column ( const Column & right )<br />
copy constructor, used in copying Columns to standard library containers.<br />
The copy constructor is for internal use only: it does not affect the disk fits file associated<br />
with the object.<br />
24.3.2.2 <strong>CCfits</strong>::Column::Column ( int columnIndex, const String & columnName, ValueType<br />
type, const String & format, const String & unit, Table ∗ p, int rpt = 1, long w = 1,<br />
const String & comment = "" ) [protected]<br />
new column creation constructor<br />
This constructor allows the specification of:<br />
Parameters<br />
Generated on Tue Dec 6 2011 16:12:51 for <strong>CCfits</strong> by Doxygen
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