matlab.io.fits.fileMode

Get I/O mode of FITS file

Syntax

fmode = matlab.io.fits.fileMode(fptr)

Description

fmode = matlab.io.fits.fileMode(fptr) returns the I/O mode of an open FITS file. The function returns fmode as either 'READONLY' or 'READWRITE'.

Examples

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Get I/O Mode of FITS File

Open Live Script

import matlab.io.*
fptr = fits.openFile("tst0012.fits");
fmode = fits.fileMode(fptr)

fmode = 
'READONLY'

fits.closeFile(fptr)

Tips

This function corresponds to the fits_file_mode (ffflmd) 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.

Extended Capabilities

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Thread-Based Environment
Run code in the background using MATLAB® `backgroundPool` or accelerate code with Parallel Computing Toolbox™ `ThreadPool`. (since R2026a)

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

Version History