The
graphing window shows the direction field of a differential equation
that is selected by means of the pulldown menu [v].
In
the 'set target mode' the cooridinates of the cursor are displayed in
cyan and marked 'target.' Clicking on the window to place a square cyan
target. This changes the mode to 'set initial conditions.' The cursor
position is then read out in white. A click on the window now sets the
initial condition of an integral curve, drawn in yellow. If the curve
goes through the target it turns green.
Clear
the solution curves using the [Clear Curves] key. Return to 'set target
mode' using the [Set Target] key.
©
2001 H. Hohn