| Re: SAV file generation with command line arguments [message #37137 is a reply to message #37136] |
Tue, 18 November 2003 21:15  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Sangwoo writes:
> I have a simple question. Is it possible to create a .sav application
> from a procedure including command line arguments? I know that making
> a .sav file from a procedure like below is absolutely possible :
>
> pro example
> ....................
> end
>
> But, isn't it possible from a procedure like below? :
>
> pro example, a, b
> ...........................
> end
>
> I know that IDL VM doesn't allow access to command line. Does it mean
> the answer to my question is negative?
No, it means the answer to your question is complicated. :-)
It is true that you can't pass command line arguments
to IDL save files. (There is no, uh, command line.)
But that is not to say you can't write procedures
with arguments and save them as save files. It's just
that those arguments can't be there when the file is
run. If you need the arguments, you have to work out
how to get them. In other words, you have to treat them
as optional arguments.
One option is to open a dialog and allow the
user to enter the arguments. Another option is
to read the arguments out of a data file (which
some people create with a shell script so that
their program *appears* to accept command line
arguments.
Rob Dimeo brought a nifty little program to my
attention this week that was written by Jim
Pendleton, an RSI programmer who writes awfully
clever IDL code, that may help with the latter.
The program is named SOURCEROOT. It allows you
to store data files in the same directory as
your pro files, and then distribute the files
to any location. The SOURCEROOT program figures
out which directory the pro files are being
run from, so it can locate the data files
without having to know ahead of time where
they are. Neat. It works like this:
file = filepath('data.dat',root = sourceroot())
You can find the program here:
http://www.rsinc.com/codebank/search.asp?FID=35
There are probably other solutions as well. But you
have to be pretty creative to discover some of them. :-)
Cheers,
David
--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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