## Time

To change Time for use the current computations in Phaser:

Numerics: Click on the Numerics button on the Main application window. This brings up the Numerics Editor to the foreground.

Time: Click on theTimebutton on the button bar of the Numerics Editor. This brings up the Time panel for the current computations. The twp most commonly used controls areStart plottingandStop plotting.Now, simply type the desired values in the appropriate textfield.

Start Plotting:To specify the time units after which the computed points to be displayed. The solution are, of course, computed from the initial time but not displayed until Start Plotting time. This feature is useful for discarding early parts, transients, of a solution so that the ultimate fate of the solution can be discerned more readily.Stop PlottingTo specify the time units until which the solutions are to be computed. The solution are, of course computed from the initial time but displayed between Start Plotting and Stop Plotting times.

Apply: Click the Apply button to register the changes.

Phaser: Click on the Phaser button to return to the Main Application window.NOTES:

- Time is relative. That is, each solution is computed starting from its own initial time for the set units of time.
- MAPs can be iterated only in forward time; therefore, Start and Stop should be integers with 0 ≤ Start Plotting ≤ Stop Plotting.
- ODEs can be solved both forward and backward in time. If 0 ≤ Start Plotting ≤ Stop Plotting, solutions are computed in forward time. If Stop Plotting ≤ Start Plotting ≤ 0, solutions are computed in backward time. If Stop Plotting ≤ 0 ≤ Start Plotting then the solutions are computed first forward for Start Plotting time units and then backward for Stop Plotting time units.