POLKING contains two Matlab M files for displaying the direction field and phase plane associated with an ordinary differential equation
dy/dt = f(y,t)
DFIELD5 is an interactive tool for studying single first order differential equations. When DFIELD5 is executed, a DFIELD5 Setup window is opened. The user may enter the differential equation and specify a display window using the interactive controls in the Setup window.
When the Proceed button is pressed on the Setup window, the DF Display window is opened. At first this window displays a direction line field for the differential equation. When the mouse button is depressed in the DFIELD5 Display window, the solution to the differential equation with that initial condition is calculated and plotted.
DFIELD5 is copywright (c) 1995, 1997, 1998 John C. Polking, Rice University.
PPLANE5 is an interactive tool for studying planar autonomous systems of differential equations. When PPLANE5 is executed, a PPLANE5 Setup window is opened. The user may enter the differential equation and specify a display window using the interactive controls in the Setup window. Up to 4 parameters may also be specified. In addition the user is give a choice of the type of field displayed and the number of field points.
When the Proceed button is pressed on the Setup window, the PPLANE5 Display window is opened, and a field of the type requested is displayed for the system. When the mouse button is depressed in the PPLANE5 Display window, the solution to the system with that initial condition is calculated and plotted.
This is version 5.0b10, and will only run on version 5 of MATLAB. PPLANE5 is copywright (c) 1995, 1997, 1998 John C. Polking, Rice University.
Files you may copy include:
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