The 1-D View window is opened by selecting the 1-D View
option from the Panels menu button located in the Command window.
The 1-D View window can only be opened when the current dynamical
system is a one-dimensional mapping,
. Multiple 1-D View
windows can be open simultaneously. All
1-D View windows display the same data, but they may use different scalings.
The window displays the ``cobweb diagram''
for trajectories of the system.
That is, given an initial point
, we draw a vertical line from
to
, and then a horizontal line to
.
We then repeat the process starting for
drawing lines
from
to
to
, and so forth.
When the window is open, data is displayed as it is computed.
When the user resizes the window, the current variable ranges are
maintained, but the scaling is adjusted accordingly.
As the user moves the mouse in the drawing canvas, the current
coordinates
of the mouse position are displayed in the window's
panel. This region is blank when the mouse does not point
into the canvas. Mouse events in the main drawing canvas have the following
effects:
- The SELECT
button sets the direction of the iterator to ``forward.'' It
also reads the values indicated by the cursor and adjusts the value
of the variable in the Selected Point window.
- Dragging the SELECT button while holding down SHIFT creates an elastic rectangle used
to rescale the window. When the user releases SELECT, a notice
appears with the options to enlarge the
view (the default, also known as ``zoom in''),
shrink the view (also known as ``zoom out''),
or cancel the selection. If the enlarge option is selected, the scaling is
adjusted so that the selected region fills the canvas. If the
shrink option is selected, the view is rescaled so that
the whole view is put into the selected rectangle. The
values in the horizontal and vertical min and max text fields
are updated automatically and a screen refresh is performed.
- The MENU button
sets the direction of the iterator to ``backward.'' It
also reads the values indicated by the cursor and adjusts the
value of the variable in the Selected Point window.
- Clicking the ADJUST button is equivalent to selecting
the Continue button on the Orbits window.