HP 48g Graphing Calculator - Manual (Page 313)

between two plotted points. The default step-size for
C is an interval equal to 1 pixel.
When checked, the step-size is interpreted to represent
pixels. When unchecked (default) the step-size is
interpreted to represent units.
See the Function plot type.
See the Function plot type.
See the Function plot type.
Special Notes
■ For conic plots, the HP 48 actually plots the two branches of
the conic section separately. This may introduce one or two
discontinuities in the connected graph. Specifying a smaller step size
(decreasing the interval between plotted points) helps eliminate
visual discontinuities.
m If flag -1 (Principal Values) is set, the Conic plot will only display
its principal branch (half of the plot). Clear flag -1 and redraw to
plot the entire conic section.
■ Equations that are higher than second-order in the independent
or dependent variable are converted to their second-order Taylor
approximations before being plotted.
■ Conic is a useful plot type for plotting systems of equations
involving two variables where none of the equations are higher than
second order in either variable (see Example 2 in “Truth Plots" for
a sample application).
Example: Display the conic example plot. ELLIP:
-f 3j/“ — 18 = 0. If necessary, type in IdEFlCH to install
the EXAMPLES directory then:
23
(VAR)
p , , , ,
HHHnUBXQl
After plotting, press (CANCEL) (r»]f PLOT) to review the PLOT forms
that generated the plot. Experiment by changing values or settings
and redrawing the plot.
Plot Types 23-13