matlab.io.fits.getColType

Get scaled column data type, repeat value, and width

Syntax

[dtype,repeat,width] = matlab.io.fits.getColType(fptr,colnum)


Description

[dtype,repeat,width] = matlab.io.fits.getColType(fptr,colnum) returns the data type, vector repeat value, and the width in bytes of a column in an ASCII or binary table.

Examples

Get Type of Table Column

Open a sample FITS file that has a table in the second HDU. Get information about the fifth column of the table. Then close the sample file.

import matlab.io.*
fptr = fits.openFile("tst0012.fits");
fits.movAbsHDU(fptr,2);
[dtype,repeat,width] = fits.getColType(fptr,5)

dtype = 
'TFLOAT'

repeat = 
3

width = 
4

fits.closeFile(fptr)

Tips

• This function corresponds to the fits_get_coltype (ffgtcl) 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

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.getColType function fully supports thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.

Version History

R2026a: Use function in thread-based environments

You can use this function in thread-based environments.