matlab.io.fits.readKeyDbl

Read keyword as double precision value

Syntax

[value,comment] = readKeyDbl(fptr,keyname)


Description

[value,comment] = readKeyDbl(fptr,keyname) returns the specified key and comment.

This function corresponds to the fits_read_key_dbl (ffgkyd) function in the CFITSIO library C API.

Examples

import matlab.io.*
fptr = fits.openFile('tst0012.fits');
n = fits.getNumHDUs(fptr);
for j = 1:n
    fits.movAbsHDU(fptr,j);
    [key,comment] = fits.readKeyDbl(fptr,'NAXIS');
    fprintf('HDU %d:  NAXIS %s, "%s"\n', j, key, comment);
end
fits.closeFile(fptr);