The popularity of IDL made it a development language in a lot of domains (Medical imaging, Meteorology, and Astronomy). It's possible to download some free packages and use it to, for example, analyze spectra of IUE or images of HST.
In the normal use, IDL doesn't know where the libraries are. You have to add the location path to the set of path in witch IDL will look for procedures files.
The WWW address where those package are available are in the second part of the references .
The Add_path command
To have access of the list of those package (only at IAG, ask your system manager to install them if needed, a copy of our add_path is here ) , just do:
In this example, there are 15 different libraries available. If you have to use both the astro and the esrg libraries, do:
Using the /verbose keyword, IDL print all the searching paths, including the new added ones.
The astro package allows you to work with fits files, to transform
coordinates, to unred observational data, etc.
You can also add a personal path, using the path='my_IDLdirectory' keyword.
All those package are in the directory /usr/local/rsi/contrib/Just have a look at them.
Help in the contrib packages
The procedures accessible with the external packages don't have help pages in the idlhelp hypertext help tool. Anyway, most of them have a documentation in the header of the procedures files themselves that you can access under idl.
IDL courses C. Morisset © 2004 IA/UNAM V 2.2