Texas Instruments TI-89 사용자 설명서

3D Graphing

 407

 These examples use the same x, y, and z Window variable values as a 

 

viewing cube. If you use 

, press Z to look down the z axis.

Notes About Implicit Plots

Notes About Implicit Plots

Notes About Implicit Plots

Notes About Implicit Plots

For an implicit plot:

•

The 

 Window variable has no affect. Only the 

 contour is drawn, 

regardless of the value of ncontour. The displayed plot shows where the implicit form 
intersects the xy plane. 

•

You can use the cursor keys to animate the plot. 

•

You cannot trace (

…) the implicit plot itself. However, you can trace the unseen wire 

frame graph of the 3D equation.

•

It may take awhile to evaluate the equation initially.

•

Because of possible long evaluation times, you first may want to experiment with 
your 3D equation by using Style=WIRE FRAME. The evaluation time is much 
shorter. Then, after you’re sure you have the correct Window variable values,  set 
Style=IMPLICIT PLOT.

8 Í 

Example: Implicit Plot of a More Complicated 

Example: Implicit Plot of a More Complicated 

Example: Implicit Plot of a More Complicated 

Example: Implicit Plot of a More Complicated 

Equation

Equation

Equation

Equation

You can use the IMPLICIT PLOT graph format style to plot and animate a complicated 
equation that cannot be graphed otherwise. Although it may take a long time to evaluate 
such a graph, the visual results can justify the time required.