schiebel@cs.wvu.wvnet.edu (Darrell Schiebel) (09/08/90)
Could anyone out there recomend dynamical system simulators, especially public domain simulators? I would really appreciate any responses. Many Thanks, Darrell Schiebel (schiebel@a.cs.wvu.wvnet.edu) (UN027714@wvnvaxa.wvnet.edu) (drs@baks.bell-atl.com)
cjoslyn@bingvaxu.cc.binghamton.edu (Cliff Joslyn) (09/10/90)
put DYNAMIC INF cybsys-l pw=asphynx Here's some information about software packages for dynamical simulation. The best package for the PC for dynamical systems analysis that I know of is: Dynamical Systems Inc. PO Box 35241 Tucson AZ 85740 602-825-1331 The author is Dr. William Schaffer, who knows his stuff. The scope of the package is quite good. Discrete maps, two integrators with noise, bifurcation diagrams, phase space diagrams, Poincare sections, power analysis, fractal dimension calculation, data importation, good graphics. Requires a fortran compiler. The interface is from the dark ages, but with a promised upgrade. The following is a repost of an old new message: Article 662 of sci.math.symbolic: ================================================================ >From: bilbo@navajo.berkeley.edu (Bill Baringer) Newsgroups: sci.math,sci.electronics,sci.misc,sci.physics,sci.research,sci.math.num-analysis,sci.math.symbolic Subject: Dynamical systems simulation package available Keywords: Simulation, Chaos, Dynamical Systems Date: 6 Jun 89 04:53:15 GMT I thought I'd pass this on, in hopes that it would be of general interest. ============================================================================ INSITE is a collection of easy-to-use programs for the simulation and characterization of dynamical systems, with an emphasis on chaotic systems. INSITE runs on the X11 graphics package under UNIX and on the MetaGraphics graphics package under PC-DOS. There is a short write-up on it in the August 1987 issue of the Proceedings of the IEEE. It contains graphically based, interactive programs that: calculate and plot trajectories and orbits, calculate and plot bifurcation diagrams of continuous- or discrete-time systems, calculate Lyapunov exponents (via simulation), calculate correlation dimension of attractors (from a data file obtained via experiment or simulation), calculate and plot one-dimensional invariant manifolds of a (Poincare) map, calculate and plot periodic solution of continuous- or discrete-time systems, and calculate and plot phase portraits of two-dimensional continuous-time systems. The software is now available for distribution. The complete source code is included. Ordering information on the software can be obtained by writing INSITE P.O. Box 9662 Berkeley, CA, 94709-9662 -- O-------------------------------------------------------------------------> | Cliff Joslyn, Cybernetician at Large, cjoslyn@bingvaxu.cc.binghamton.edu | Systems Science, SUNY Binghamton, Box 1070, Binghamton NY 13901, USA V All the world is biscuit shaped. . .
bilbo@trinity.berkeley.edu (Bill Baringer) (09/11/90)
In article <3971@bingvaxu.cc.binghamton.edu> cjoslyn@bingvaxu.cc.binghamton.edu.cc.binghamton.edu (Cliff Joslyn) writes: > > INSITE Software > P.O. Box 9662 > Berkeley, CA, 94709-9662 I just wanted to mention that the phone number for the above company is (415) 841-0315.
fishwick@fish.cis.ufl.edu (Paul Fishwick) (09/11/90)
In article <880@h.cs.wvu.wvnet.edu> schiebel@cs.wvu.wvnet.edu (Darrell Schiebel) writes: > > Could anyone out there recomend dynamical system simulators, > especially public domain simulators? I would really appreciate > any responses. > > > Many Thanks, > > Darrell Schiebel > (schiebel@a.cs.wvu.wvnet.edu) > (UN027714@wvnvaxa.wvnet.edu) > (drs@baks.bell-atl.com) You can try out the differential equation part of SimPack. Here is some info on it. To get the package do an ftp according to these instructions: * Archives available via FTP to bikini.cis.ufl.edu (128.227.224.1). Login as 'ftp', use your last name as the password, change directory to pub/simdigest. Do 'type binary' before any file xfers. * Simulation Tools available by doing above and changing the directory to pub/simdigest/tools. ----------------- Documentation on DEQ: IMPORTANT: To take advantage of this software (DEQ), you need the following on your UNIX system: (1) grtool - an interactive graphics plotting package for all plotting functions. grtool is in the simulation tools library at the University of Florida, and can be freely FTP'd. Follow the instructions by looking at the beginning of each Simulation Digest Issue (comp.simulation). (2) gcc - one of the primary source routines is written in ANSI C. The c compiler 'gcc' is available freely from the Gnu Free Software Foundation. See the file 'gnu.software.Z' also in the UF simulation library. This will give you information on how to get 'gcc'. To make DEQ, do a 'make all'. Then you can run 'deq' from the UNIX command line as follows: %deq You have the choice of entering one of two types of systems. Either (1) a single equation with high order terms (derivatives). Note that the system may be homogeneous or non-homogeneous, and that the left hand side of the equation must be the higher order term. Note the following notation: use x[1] for the first derivative of x with respect to time (i.e. x' or dx/dt), x[2] is the second derivative, and so on. x[0] is simply x. (2) a set of first order equations for an 'n'-dimensional system. You will be prompted for each equation in turn. Here x[1] means the first state variable. x[2] means the second state variable, and so on. EXAMPLE 1 --------- An Example of a single equation is to enter: x[2] = -16*x[0] + 10*cos(3.7*t) Note that this equation is x'' = -16x + 10cos(3.7t) using standard notation. Try plotting this over time (always denoted as 't') by specifying 't' as the x-axis variable, and x[0] as the y axis variable to be plotted by grtool. EXAMPLE 2 --------- An Example of the Lorenz System (Phase Plot) is to enter (note: left hand sides of equations are prompted by DEQ): x[1]' = 10*(-x[1] + x[2]) x[2]' = 28*x[1] - x[2] - x[1]*x[3] x[3]' = -2.666*x[3] + x[1]*x[2] Try plotting x[1] vs. x[2] when prompted for this information. +------------------------------------------------------------------------+ | Prof. Paul A. Fishwick.... INTERNET: fishwick@bikini.cis.ufl.edu | | Dept. of Computer Science. UUCP: gatech!uflorida!fishwick | | Univ. of Florida.......... PHONE: (904)-392-1414 | | Bldg. CSE, Room 301....... FAX is available | | Gainesville, FL 32611..... | +------------------------------------------------------------------------+
MATKMB@lure.latrobe.edu.au (10/12/90)
ODE is an IBM PC simulator for continuous or discrete systems. Features: Easy-to-use menus with mouse support. Equations entered in natural notation, stored in ASCII files. Automatic plotting, laser printer support. Several different ode algorithms, up to 6th order. Many examples included, including chaotic. Printed manual for registered users. Versions 1 and 2 are used at about a dozen Australian universities. Version 2.5 is due to be released in a few weeks. Shareware version will be available, registration price and distribution method yet to be decided. If interested, please send a message to: matkmb@lure.latrobe.edu.au.oz or write to Keith Briggs PO Box 75 Heidelberg West Australia 3081 You will be informed when ODE version 2.5 is ready.