PHYS-4007/5007 Exam 2 Web Home Page

This web page contains the links of the Exam 2 write-up and the various IDL files needed to carry out the calculations of Exam 2 for PHYS-4007/5007 Computational Physics. These 4 IDL procedure/function files here are in standard ASCII (text) format. Depending on your browser, you will either see a "Download" box when you double click on the ASCII (i.e., IDL) files, or the text will appear in your browser. In this second case, just follow these procedures:

Open a new file in a text editor such as Emacs (in Linux) or Notepad (in Windows).
Highlight the text in the browser, then select `Copy' from a `Edit' pull-down menu or by clicking your right mouse button.
Move the cursor to your opened empty file and paste the text to this file.
Save this empty file to a named file as indicated by the filename listed on this web page (make sure the filename suffix is .pro.) Following this, leave the editor.

Files to Download

A full description of these files are given in the Exam 2 write-up sent to you via email. Download the following files to a subdirectory where you wish to carry out these calculations (i.e. the so-called working directory) following the directions above. Double click on each of the files listed.

The IDL Files

IMPORTANT NOTE: Due to OIT's paranoia about security issues, files ending in either ".dat" (standard Unix data files) and ".pro" (IDL procedure and function files) will not show up on a web browser even though those files exist on the web server disk. To counteract this, I have changed the name of all ".pro" files to ".txt" files. Make sure that your downloaded IDL files have a filename suffix of ".pro" as shown on web page link below. For instance, when you click on "orbitsfinal.pro", this file must have the filename of "orbitsfinal.pro" on your computer.

orbitsfinal.pro IDL driver code to carry out the calculations and generate the plots.

orbeqnfinal.pro Supplies ORBITSFINAL and RK4 with the derivative equations.

orbplot.pro IDL procedure to creates polar plots of an orbit.

orbticks.pro Determines the tick marks for orbit plots.

Note that students will have to supply the correct coding for the differential equations in the ORBEQNFINAL function as explained in this code and on the Exam 2 write-up sent via email.

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Last modified: November 23, 2014 by D.G. Luttermoser

orbitsfinal.pro	IDL driver code to carry out the calculations and generate the plots.
orbeqnfinal.pro	Supplies ORBITSFINAL and RK4 with the derivative equations.
orbplot.pro	IDL procedure to creates polar plots of an orbit.
orbticks.pro	Determines the tick marks for orbit plots.