The current version of the HEALPix package provides an IDL startup file which defines various environment variables for your convenience, and adds the HEALPix IDL directory tree to your IDL_PATH. In order to utilise this feature, the user should invoke IDL using the commands hidl or hidlde which are aliases defined in the HEALPix profile created during the installation process for the package.
Before starting hidl or hidlde, (re)define the environment variable $IDL_PATH so that it looks like:
``+/path/to/my/idl/routines:+/path/to/other/idl/routines:<IDL_DEFAULT>''
(where <IDL_DEFAULT> should be typed literally and the +/path means that
subdirectories of path will be searched recursively). For example, if
young Albert types in Bourne shell:
export IDL_PATH=``+/home/aeinstein/brownian:<IDL_DEFAULT>''
hidl
he will start an IDL session in which HEALPix IDL routines and all those located
in subdirectories of /home/aeinstein/brownian are accessible.
Version 3.11, 2013-04-24