Isoclines

Choose a differential equation using the [v] popdown menu.

Position the cursor arrow over the graphing window to display coordinates. Depress the mousekey over the graphing window to display a solution with that initial condition. The solution can be dragged by moving the cursor with the mousekey depressed. Releasing it will leave the solution in place.

The slope field can be set at bright, dim, or off, using the [Slope field] box.

Grab the \([m]\) slider to display the corresponding isoclines. Release the slider to leave the isocline on the graphing window.

Most of the differential equations have a parameter \(a\) which can be set using a slider. When you change the slider the isoclines and solution curves adjust accordingly.

Clear solutions, isoclines, or both, using the keys at bottom.

This is an adaptation of the Isocline tool in "Interactive Differential Equations," IDE, an Addison Wesley product created by Hohn, Cantwell, West, McDill, and Strogatz.