Quick Tour

2 Quick Tour

When started, Runge looks like this:

Main Window

There are 4 areas here:

1.: Menu and toolbar.
2.: Left pane with four selectable sub-panes.
3.: Solutions computed.
4.: Right pane with equations you enter and solutions’ values you compute.

If you click Start button at this moment it would solve $x˙= 0, t ∈ [0,1]$ problem. That’s because empty field for $F(t,x)$ system on the right pane is equivalent to $0$ and default range for independent variable is $[0,1]$ . Click Start button or choose “Start” item in “Run” menu

Run Menu

Select “Solutions” subpane and click on first solution to see results on the right pane:

Solutions

The columns you see out there are: values of independent variables $ti,i = 0,1,...$ , solution values $x(ti),i = 0,1, ...$ and recommended step values. You can also delete this solution or export it to MS Excel comma-separated values file or to MATLAB script using the following buttons:

Click 2D Draw button to see solution graph:

2D Draw Window

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