Here are example codes that will help you do the homeworks
IDL initialization for .profile.local
IDL initialization for .login.local
An example Makefile.in for use on any machine
Compiler.options file for use with Makefile.in
build utility for use with Makefile.in
Example IDL script to make a publishable plot
Example IDL script to read data
A useful subroutine for setting up the wavelength grid for HW 1