class TFITSHDU: public TNamed

 Clean path from possible filter and put the result in 'dst'.

 TFITSHDU constructor from file path with HDU selection filter.
 Please refer to CFITSIO manual for more information about
 HDU selection filters.
 Examples:
 - TFITSHDU("/path/to/myfile.fits"): just open the PRIMARY HDU
 - TFITSHDU("/path/to/myfile.fits[1]"): open HDU #1
 - TFITSHDU("/path/to/myfile.fits[PICS]"): open HDU called 'PICS'
 - TFITSHDU("/path/to/myfile.fits[ACQ][EXPOSURE > 5]"): open the (table) HDU called 'ACQ' and
                                                        selects the rows that have column 'EXPOSURE'
                                                        greater than 5.

 TFITSHDU constructor from filepath and extension number.

 TFITSHDU constructor from filepath and extension name.

 TFITSHDU destructor.

 Release internal resources.

 Do some initializations.

 Load HDU from fits file satisfying the specified filter.
 Returns kTRUE if success. Otherwise kFALSE.
 If filter == "" then the primary array is selected

 Get the value of a given keyword. Return "" if not found.

 Print records.

 Print HDU's parent file's metadata.

 Print column information

 Print full table contents

 Print metadata.
 Currently supported options:
 ""  :  print HDU record data
 "F" :  print FITS file's extension names, numbers and types
 "F+":  print FITS file's extension names and types and their record data
 "T" :  print column information when HDU is a table
 "T+" : print full table (columns header and rows)

 Read image HDU as a displayable image. Return 0 if conversion cannot be done.
 If the HDU seems to be a multilayer image, 'layer' parameter can be used
 to retrieve the specified layer (starting from 0)

 If the HDU is an image, draw the first layer of the primary array
 To set a title to the canvas, pass it in "opt"

 Read image HDU as a matrix. Return 0 if conversion cannot be done
 If the HDU seems to be a multilayer image, 'layer' parameter can be used
 to retrieve the specified layer (starting from 0) in matrix form.
 Options (value of 'opt'):
 "S": stretch pixel values to a range from 0.0 to 1.0

 Read image HDU as a histogram. Return 0 if conversion cannot be done.
 The returned object can be TH1D, TH2D or TH3D depending on data dimensionality.
 Please, check condition (returnedValue->IsA() == TH*D::Class()) to
 determine the object class.
 NOTE: do not confuse with image histogram! This function interprets
 the array as a histogram. It does not compute the histogram of pixel
 values of an image! Here "pixels" are interpreted as number of entries.

 Get a row from the image HDU when it's a 2D array.

 Get a column from the image HDU when it's a 2D array.

Get column number given its name

 Get a string-typed column from a table HDU given its column index (>=0).

 Get a string-typed column from a table HDU given its name

 Get a real number-typed column from a table HDU given its column index (>=0).

 Get a real number-typed column from a table HDU given its name

 Change to another HDU given by "filter".
 The parameter "filter" will be appended to the
 FITS file's base path. For example:
 hduObject.Change("[EVENTS][TIME > 5]");
 Please, see documentation of TFITSHDU(const char *filepath_with_filter) constructor
 for further information.

 Change to another HDU given by extension_number

 Get a collection of real vectors embedded in cells along a given column from a table HDU. colnum >= 0.

 Get a collection of real vectors embedded in cells along a given column from a table HDU by name

 Get a real vector embedded in a cell given by (row>=0, column>=0)

 Get a real vector embedded in a cell given by (row>=0, column name)

 Get the name of a column given its index (column>=0).
 In case of error the column name is "".

Metadata access methods

Table readers