5-4-1

Manipulating a Graph on the 3D Graph Window

5-4 Manipulating a Graph on the 3D Graph Window

This section describes how to enlarge and reduce the size of a graph, how to change the eye position to view the graph along a particular axis, and how to perform other operations like automatic rotation.

Important!

•All of the operations described in this section can be performed only while the 3D Graph window is active.

Enlarging and Reducing the Size of a Graph

A displayed 3D graph can be zoomed so it is enlarged or reduced. The zoom operation is always performed based on the center of the Graph window. You cannot select the area to be zoomed.

•To enlarge a graph, tap W, or tap [Zoom] and then [Zoom In].

•To reduce the size of a graph, tap E, or tap [Zoom] and then [Zoom Out].

Starting from the normal size, you can enlarge a graph six steps or reduce its size eight steps.

Switching the Eye Position

The following items describe how to change the eye position and view a displayed 3D graph along a particular axis. All of the example displays below show the graph of the expression z = x2/2 – y2/8, which we graphed under “3D Graph Example” on page 5-3-3.

•To view the graph facing the x-axis, tap [Zoom] and then [View-x], or press the xkey.

•To view the graph facing the y-axis, tap [Zoom] and then [View-y], or press the ykey.

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