HP 48g Graphing Calculator - Manual (Page 326)

The Slopefield PLOT Form
23
Shows the current angle mode. Change it by pressing
one or more times or by using CHOOo.
Enter the current expression, equation, or user-defined
function to be plotted. Names of variables containing
expressions, equations, or UDFs may be used in place
of the objects themselves.
Enter the name of one of the independent variables.
Enter the number of columns in the sampling grid.
Enter the name of the second independent variable.
Enter the number of rows in the sampling grid.
Opens the PLOT OPTIONS form.
Erases the PICT screen (without displaying it).
Stores all of the values in their appropriate places in
the reserved variables—EQ, PPAR, and VPAR—
and draws the plot accordingly, leaving you in the
PICTURE environment when finished.
The Slopefield PLOT OPTIONS Form
K - L E F T
s Enter the horizontal display range, corresponding to the
K - - R I G H T 5
first independent variable (entered in
I N D E P ) .
Y“HERR" Enter the vertical display range, corresponding to the
Y”F h R» second independent variable (entered in DEPHD).
EGF
I N D E F
D E P N C
S T E P
OPT
ERAS
D R A W
Examples
Example 1:
Display the Slopefield example plot, SPEED: y' =
If necessary, type in TEFiCH to install the EXAMPLES
directory and then:
Press (VAR) EXflt'1
fN>cr) SPFLD
P L O T S
After plotting, press
(CAIMCEL) ff^fPLOT
) to review the PLOT forms
that generated the plot. Experiment by changing values or settings
and redrawing the plot.
23-26 Plot Types