HP 49g+, Руководство пользователя, Страница: 726 / 862

Page 22-14
•
AXES: when selected, axes are shown if visible within the plot area or
volume.
•
CNCT: when selected the plot is produced so that individual points are
connected.
•
SIMU: when selected, and if more than one graph is to be plotted in the
same set of axes, plots all the graphs simultaneously.
Press
@)PLOT
to return to the PLOT menu.
Generating plots with programs
Depending on whether we are dealing with a two-dimensional graph defined
by a function, by data from
Σ
DAT, or by a three-dimensional function, you
need to set up the variables PPAR,
Σ
PAR, and /or VPAR before generating a
plot in a program. The commands shown in the previous section help you in
setting up such variables.
Following we describe the general format for the variables necessary to
produce the different types of plots available in the calculator.
Two-dimensional graphics
The two-dimensional graphics generated by functions, namely, Function,
Conic, Parametric, Polar, Truth and Differential Equation , use PPAR with the
format:
{
(x
min
, y
min
) (x
max
, y
max
) indep res axes ptype depend
}
The two-dimensional graphics generated from data in the statistical matrix
Σ
DAT, namely, Bar, Histogram, and Scatter , use the
Σ
PAR variable with the
following format:
{
x-column y-column slope intercept model
}
while at the same time using PPAR with the format shown above.
The meaning of the different parameters in PPAR and
Σ
PAR were presented in
the previous section.