matlab.io.fits.getHDUnum

Get number of current HDU in FITS file

Syntax

N = matlab.io.fits.getHDUnum(fptr)

N = matlab.io.fits.getHDUnum(fptr) returns the number of the current HDU in the FITS file. The primary array has HDU number 1.

import matlab.io.*
fptr = fits.openFile("tst0012.fits");
N = fits.getHDUnum(fptr)

N = 
1

fits.closeFile(fptr)

This function corresponds to the fits_get_hdu_num (ffghdn) function in the CFITSIO library C API.
To use this function, you must be familiar with the CFITSIO C interface. You can access the CFITSIO documentation at the CFITSIO website.

The matlab.io.fits.getHDUnum function fully supports thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.

You can use this function in thread-based environments.