dfield and pplane
the java versions
The java versions of
contain most of the features of the original
MATLAB versions. Click on the appropriate button below to run the
dfield or pplane applet.
If you do not see the applet buttons above, it means that your browser is not Java 1.1.6 enabled. There are several possible reasons for this, including the following.
pplaneusing modern browsers. With Netscape 6 it is enabled by default. However, it is necessary to configure printing in Internet Explorer 5.5 before printing is possible. To do so perform the following steps. Notice that it will be necessary to restart your computer at the end of this procedure.
Several textbooks on differential equations refer to and use dfield and pplane. Among them are Differential Equations and Differential Equations with Boundary Value Problems by John Polking, Albert Boggess, and David Arnold. They are published by Prentice Hall.
pplaneare copyrighted in the name of John Polking. They are not in the public domain. However, they are being made available free for use in educational institutions. This offer does not extend to any application that is made for profit. Users who have such applications in mind should contact John Polking.
It would be greatly appreciated if you would contact
and tell him how you are using
pplane, what level of course you are teaching, how many
students you have, and what you think of the programs. If you
acknowledge your use of the programs in this way you will be informed
as new versions are released. Since changes are made as bugs are
discovered and corrected and as good, new ideas are implemented, this
will occur a few times each year.