To see fine structure, it is often desirable
to zoom in on a particular portion of the phase
space. Conversely, sometimes a larger phase space
perspective is desired. Changing the scale of
the view window can be accomplished by
editing the Min: and Max: text fields to
the right of the horizontal and vertical variables.
Change the minimum z value to -100 instead of -5
and change the maximum to 100.
Be sure and enter a Carriage-Return after you edit
each text field -- then select Refresh from the Options
menu button and the orbits will appear compressed and much further
away.
(Figure )
This process can also be used to
zoom in, or to view any
rectangular portion of the xz-plane.
It is also possible to rescale using a
``rubber-band'' method. This is often preferred
for zooming in, whereas the method described
above is often preferred for zooming out.
Position the mouse pointer in the view
window near the upper left corner of the
Lorenz attractor. Press
and keep the
button depressed.
(You may release the Shift key.)
Now drag down and to the
right until the attractor is enclosed in a
rectangle called the rescaling box.
When the attractor is
satisfactorily enclosed within the rescaling
box, release
.
A notifier box offering the
options of zoom in, zoom out, or cancel will
pop up. Click
on the button zoom in. The attractor
will be displayed larger than it was before. (Figure
)