The java versions of dfield and pplane
contain most of the features of the original MATLAB versions.
Click on the appropriate button below to run the
dfield or pplane applet.
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.
dfield and
pplane are 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
John Polking,
and tell him how you are using dfield and
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.