Default Options.

After entering the commands bd0, bd, or 2d, you will be asked whether you want solution labels, grid lines, titles, or axes labels. For quick plotting it is convenient to bypass these selections. This can be done by the default commands d0, d1, d2, d3, or d4 below. These can be entered as a single command or they can be entered as prefixes in the bd0 and bd commands. Thus, for example, one can enter the command d1bd0.

d0

 : Use solid curves, showing solution labels and symbols.

d1

 : Use solid curves, except use dashed curves for unstable solutions and for solutions of unknown stability. Show solution labels and symbols.

d2

 : As d1, but with grid lines.

d3

 : As d1, except for periodic solutions use solid circles if stable, and open circles if unstable or if the stability is unknown.

d4

 : Use solid curves, without labels and symbols.

If no default option d0, d1, d2, d3, or d4 has been selected or if you want to override a default feature, then the the following commands can be used. These can be entered as individual commands or as prefixes. For example, one can enter the command sydpbd0.

sy

 : Use symbols for special solution points, for example, open square = branch point, solid square = Hopf bifurcation.

dp

 : ``Differential Plot'', i.e., show stability of the solutions. Solid curves represent stable solutions. Dashed curves are used for unstable solutions and for solutions of unknown stability. For periodic solutions use solid/open circles to indicate stability/instability (or unknown stability).

st

 : Set up titles and axes labels.

nu

 : Normal usage (reset special options).