It is possible to load data from a file for plots with PSTricks in TeX. According to the PSTricks manual all that is needed is a file with a list of coordinate pairs delimited by curly braces , parentheses, commas. read the conclusion >

Sometimes it is useful to have several scripts (with standard definitions) loaded immediately into scilab.
On MacOsX Scilab executes at startup the first lines of the file .scilab. The file has to be placed (if it does already exist) under the directory:
/home/User/.Scilab/scilab-version
If the file isn’t there just create one and call your scripts with the definitions to be loaded into the scilab workspace.

For example you might want to load definitions of physical constants into the workspace that are defined within ‘physical_constants.sce’. For this purpose add a line like the following into the .scilab file:

exec('Users/User/Development/scilab/Base/physical_constants.sce');