PHYS-4007/5007 Useful Fortran 77 ODE Subroutine Web Page

This web page contains the links of the various files that contain useful Fortran 77 subroutines discussed in PHYS-4007/5007 Computational Physics to solve ordinary differential equations. The files here are in standard ASCII (text) format. The files here are in standard ASCII (text) format so that when you click on the link, the code will appear in your web browser. Follow these steps to save these files on your Linux machine.

Note the name of the file on the Course Fortran 77 Web Page (e.g., rk4.f).
Open a Terminal window on your Linux account. Change directory to your Fortran subdirectory (e.g., cd fortran).
Start the emacs editor from the terminal window using the filename of a given file (e.g., emacs rk4.f).
From your web browser, click on the file link on the Course Fortran 77 Web Page (e.g., rk4.f).
When the text in the file appears highlight all of the text on the screen using the "Edit" pull-down menu and clicking "Select All."
Go back to the "Edit" pull-down menu and select "Copy."
Go to the emacs editor window and select the "Edit" pull-down menu and select "Paste."
From the emacs window, click the 'Save File' icon and then exit emacs.

Files to Download

The following is a list of useful Fortran 77 subroutines. Feel free to use them if you need them in your work.

rk4.f	Fortran 77 subroutines using the 4th-order Runge-Kutta technique for ODEs.
ode.f	Fortran 77 subroutines using the Adams method for ODEs. Note that this file also contains the DE, STEP, and INTRP subroutines.
de.f	Fortran 77 subroutine of Adams method for ODEs.
intrp.f	Fortran 77 subroutine called by de.f.
step.f	Fortran 77 subroutine called by de.f.
machin.f	Fortran 77 program to calculate data for ode.f and de.f.
f.f	Sample Fortran 77 subroutine containing the differential equations that ode.f and de.f are asked to solve.

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Last modified: September 6, 2011 by D.G. Luttermoser