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Re: calling a function [message #32898 is a reply to message #20893]

Fri, 15 November 2002 10:24

James Kuyper
Messages: 425
Registered: March 2000

Senior Member

Steve wrote:
>
> Dear all, I have a problem!
> I have a program (main.pro) written in IDL. Then, inside the main.pro
> I want to use a function that I found on Goddard library.
> The function is named glactc.pro, and the calling sequence is the
> following:
> GLACTC, ra, dec, year, gl, gb, j
> How can I call glactc.pro inside main.pro?

If it's really a function (starts with the FUNCTION keyword), then you
have to type:

result = GLACTC(my_ra, my_dec, my_year, my_gl, my_bg, my_j)

On the other hand, if it's a procedure (starts with the PROC keyword),
then you have to type:

GLACTC, my_ra, my_dec, my_year, my_gl, my_bg, my_j

You don't need the 'my_' prefixes, I'm just emphasizing that the names
don't need to match; it's also not an error if they do match.

> After that, when I compile the program, do I have to link
> glactc.pro?If yes, how can I do that?

No. All you have to do is make sure that glactc.pro is in a directory
that's in IDL's search path. That can either be in your current
directory, or in one of the directories listed in the IDL_PATH
environment variable.
Alternatively, you can load glactc.pro, even if it's not in the
IDL_PATH, by
typing:

IDL> .run /non-idl/path/name/glactc.pro

You don't need to add the '.pro' at the end; IDL will figure it out if
you leave it out.

Note: if the name of the file is different from the name of the
procedure or function that you need to execute, then you have to use the
'.run' approach. That's why it's generally a good idea to have the
function and the filename match.

> Is it possible to write "makefile" (like C programming) into IDL?

No, but the reason it's not possible is that it's not really needed.

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[Message index]

		calling a function in herself By: J�rg Schliwa on Mon, 31 July 2000 00:00
		Re: calling a function in herself By: Martin Schultz on Tue, 01 August 2000 00:00
		Re: calling a function in herself By: promashkin on Mon, 31 July 2000 00:00
		Re: calling a function By: David Fanning on Fri, 15 November 2002 17:34
		Re: calling a function By: jeyadev on Fri, 15 November 2002 11:49
		Re: calling a function By: David Fanning on Fri, 15 November 2002 10:53
		Re: calling a function By: David Fanning on Fri, 15 November 2002 10:39
		Re: calling a function By: James Kuyper on Fri, 15 November 2002 10:24
		Re: calling a function By: David Fanning on Fri, 15 November 2002 08:54

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