Hp 48g Graphing Calculator Manuel d'utilisateur Page 340

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3. Press (4^(PL0T) PPHR (NXT 1 flXES to store the intersection
point.
4. Press fr^fPLOT) E R R S E DRAW to redraw the plot using the new
axes intersection point.
Plotting Programs and User-Defined Functions
You can plot more than just expressions and equations—you can also
plot programs. And your expressions, equations, and programs can
include user-defined functions.
You can plot a program if it takes nothing from the stack, uses
the independent variable in the program, and returns exactly one
untagged number to the stack:
Real result. Equivalent to the expressions f{x) (plot type Function)
and r{6) (plot type Polar). For example, the program
plots
THEM
/W =
.SE
- 45*2 -p 350 if * < 0
1000 if * > 0
Store the program in EQ, select autoscaling, and draw the plot.
Complex result. Equivalent to (x(t),y(t)) (plot type Parametric).
For example, the program
« -s-HUM ' t'''''3“2-st +
plots the parametric equations
X = E
and
y = E -2t +I
Store the program in EQ, make ' T' the independent variable, select
autoscaling, and draw the plot.
24-2 Advanced Plot Options
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