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How can I make the headers of two fits files same in IDL? [message #92999]

Thu, 07 April 2016 21:11

Sonu Tabitha
Messages: 29
Registered: April 2016

Junior Member

Is there any way to match the headers of two fits files?

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Re: How can I make the headers of two fits files same in IDL? [message #93005 is a reply to message #92999]

Fri, 08 April 2016 07:30

wlandsman
Messages: 743
Registered: June 2000

Senior Member

On Friday, April 8, 2016 at 12:11:54 AM UTC-4, Meegle_Jade wrote:
> Is there any way to match the headers of two fits files?

This question could mean many different things.

But to make the FITS header in a file test2.fits the same as in file test1.fits

h = headfits('test1.fits')
modfits,'test2.fits',0,h

using routines from http://idlastro.gsfc.nasa.gov/homepage.html

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Re: How can I make the headers of two fits files same in IDL? [message #93006 is a reply to message #93005]

Fri, 08 April 2016 08:21

Michael Galloy
Messages: 1114
Registered: April 2006

Senior Member

On 4/8/16 8:30 AM, wlandsman wrote:
> On Friday, April 8, 2016 at 12:11:54 AM UTC-4, Meegle_Jade wrote:
>> Is there any way to match the headers of two fits files?
>
> This question could mean many different things.
>
> But to make the FITS header in a file test2.fits the same as in file test1.fits
>
> h = headfits('test1.fits')
> modfits,'test2.fits',0,h
>
> using routines from http://idlastro.gsfc.nasa.gov/homepage.html
>

I agree that this could mean many things. If by "match the headers of
two fits files" you mean check to see the differences between two
headers, then check out my routine MG_FITS_DIFF:

https://github.com/mgalloy/mglib/blob/master/src/fits/mg_fit s_diff.pro

You can ignore specified keywords as well.

Mike
--
Michael Galloy
www.michaelgalloy.com
Modern IDL: A Guide to IDL Programming (http://modernidl.idldev.com)

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Re: How can I make the headers of two fits files same in IDL? [message #93017 is a reply to message #92999]

Mon, 11 April 2016 02:26

Sonu Tabitha
Messages: 29
Registered: April 2016

Junior Member

On Friday, April 8, 2016 at 9:41:54 AM UTC+5:30, Meegle_Jade wrote:
> Is there any way to match the headers of two fits files?

Does this change the BITPIX and NAXIS values?

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Re: How can I make the headers of two fits files same in IDL? [message #93020 is a reply to message #93017]

Mon, 11 April 2016 06:06

wlandsman
Messages: 743
Registered: June 2000

Senior Member

On Monday, April 11, 2016 at 5:26:41 AM UTC-4, Meegle_Jade wrote:
> On Friday, April 8, 2016 at 9:41:54 AM UTC+5:30, Meegle_Jade wrote:
>> Is there any way to match the headers of two fits files?
>
> Does this change the BITPIX and NAXIS values?

No. You would have to first do this yourself with CHECK_FITS,/UPDATE

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Re: How can I make the headers of two fits files same in IDL? [message #93026 is a reply to message #92999]

Tue, 12 April 2016 20:31

Sonu Tabitha
Messages: 29
Registered: April 2016

Junior Member

On Friday, April 8, 2016 at 9:41:54 AM UTC+5:30, Meegle_Jade wrote:
> Is there any way to match the headers of two fits files?

Infact I have to make the header of fits file 'exponential.fits'same as that of 'empirical.fits'. I gave the following code for that

im = readfits('empirical.fits',h)
hdr = 'exponential.fits'
check_FITS, im, hdr, /UPDATE
end

I saved it as FITSMATCH.pro. On executing I am getting the following error

Library file does not contain a procedure or function.
% Compiled module: FITSMATCH.
% Attempt to call undefined procedure/function: 'FITSMATCH'.
% Execution halted at: $MAIN$

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Re: How can I make the headers of two fits files same in IDL? [message #93027 is a reply to message #93026]

Tue, 12 April 2016 22:14

Sonu Tabitha
Messages: 29
Registered: April 2016

Junior Member

On Wednesday, April 13, 2016 at 9:01:37 AM UTC+5:30, Meegle_Jade wrote:
> On Friday, April 8, 2016 at 9:41:54 AM UTC+5:30, Meegle_Jade wrote:
>> Is there any way to match the headers of two fits files?
>
> Infact I have to make the header of fits file 'exponential.fits'same as that of 'empirical.fits'. I gave the following code for that
>
> im = readfits('empirical.fits',h)
> hdr = 'exponential.fits'
> check_FITS, im, hdr, /UPDATE
> end
>
> I saved it as FITSMATCH.pro. On executing I am getting the following error
>
> Library file does not contain a procedure or function.
> % Compiled module: FITSMATCH.
> % Attempt to call undefined procedure/function: 'FITSMATCH'.
> % Execution halted at: $MAIN$

Or is there any way to do it with write_fits?

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Re: How can I make the headers of two fits files same in IDL? [message #93033 is a reply to message #93026]

Wed, 13 April 2016 06:21

wlandsman
Messages: 743
Registered: June 2000

Senior Member

You need to add

pro fitsmatch

as the first line

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