Differential Equations

[Han]

Use the geometry app. Press the [Symb] key and then choose "Edit" from the menu. Now press the Toolbox key (the "B" key) and then type in plotfield so that the cursor highlights the command "plotfield." With plotfield highlighted, press the [Help] key and then select "Example" from the menu. Press [Enter] twice, then press [Plot].

Basically, you created a geometry element named GA whose definition is:

plotfield(x*sin(y),[x = ((-6) .. 6),y = ((-6) .. 6)],'normalize')

For more information, see the built-in Help for plotfield.