Example

On all UNIX systems, X-PLOR provides the feature of environmental variables. Suppose the user has defined a UNIX variable TOPPAR in his or her ``.cshrc" file

setenv TOPPAR  /user/toppar

Then it is possible to access a file ``xyz" in the directory ``/user/toppar" in X-PLOR by specifying the filename ``TOPPAR:xyz", e.g., if the user wants to set the DISPLay file,

  SET DISPlay=TOPPAR:xyz

Here is an example of reading from a file using the environment variables:

PARA @TOPPAR:parallhdg_new.pro