🚀 go-pugleaf

>I'm looking for a plotting package that will draw orbit
>diagrams for iterated functions for viewing things like
>bifurcations.  I heard of something called MAPPER, but
>haven't be able to locate it.
>
>Something else that would nice is a plotting package that
>displays the function and then shows the behavior of the
>iterated of a particular point (specified by the user).
>It might even draw the lines from f(x) to the line x=y
>back to f(x), etc. used to illustrate the effects of
>attracting and repelling fixed points and their basins.
>
Richard Parris at Philips Exeter Academy has written a program
for the IBM-PC called feedback that can draw the web diagram for any
function typed in by the user. The program will also display the
iteration count and the current x value. The user can set any initial
seed.

The program will also do bifurcation diagrams, but rather slowly.
Zooming is possible on both the web diagram and the bifurcation.

And the best part is that the program is FREE. All you have to do
is write Richard at Philips Exeter Academy (it's somewhere in
New Hamphsire, sorry can't remember the exact address) and enclose
a blank disk and a return stamped mailer.

-- 
Larry Riddle        | riddle@mathcs.emory.edu         PREFERRED
Agnes Scott College | {decvax,gatech}!emory!riddle    UUCP 
Dept of Math        | riddle@emory.bitnet             NON-DOMAIN BITNET
Decatur, GA 30030   | (404) 371-6222                  AT&T