Total number of HDUs in FITS file
N = getNumHDUs(fptr)
N = getNumHDUs(fptr) returns the number
of completely defined HDUs in a FITS file. If a new HDU has just been
added to the FITS file, then that last HDU will only be counted if
it has been closed, or if data has been written to the HDU. The current
HDU remains unchanged by this routine.
This function corresponds to the
(ffthdu) function in the CFITSIO library C API.
import matlab.io.* fptr = fits.openFile('tst0012.fits'); n = fits.getNumHDUs(fptr); fits.closeFile(fptr);