HP 48GII, Руководство пользователя, Страница: 418 / 864

Page 12-37
•
When done, press
@EXIT
.
•
Press
@CANCL
to return to PLOT WINDOW.
•
Press
$
, or
L @@@OK@@@
, to return to normal calculator display.
Try also a Fast 3D plot for the surface z = f(x,y) = sin (x
2
+y
2
)
•
Press
„ô
, simultaneously if in RPN mode, to access the PLOT SETUP
window.
•
Press
˜
and type ‘SIN(X^2+Y^2)’
@@@OK@@@
.
•
Press
@ERASE @DRAW
to draw the plot.
•
When done, press
@EXIT
.
•
Press
@CANCL
to return to PLOT WINDOW.
•
Press
$
, or
L @@@OK@@@
, to return to normal calculator display.
Wireframe plots
Wireframe
plots are plots of three-dimensional surfaces described by z = f(x,y).
Unlike
Fast 3D
plots, wireframe plots are static plots. The user can choose the
viewpoint for the plot, i.e., the point from which the surface is seen. For
example, to produce a wireframe plot for the surface z = x + 2y –3, use the
following:
•
Press
„ô
, simultaneously if in RPN mode, to access to the PLOT
SETUP window.
•
Change
TYPE
to
Wireframe.
•
Press
˜
and type ‘X+2*Y-3’
@@@OK@@@
.
•
Make sure that ‘X’ is selected as the
Indep:
and ‘Y’ as the
Depnd:
variables.
•
Press
L @@@OK@@@
to return to normal calculator display.
•
Press
„ò
, simultaneously if in RPN mode, to access the PLOT
WINDOW screen.
•
Keep the default plot window ranges to read:
X-Left:-1, X-Right:1, Y-Near:-1,
Y-Far: 1, Z-Low: -1, Z-High: 1, XE:0,YE:-3, ZE:0, Step Indep: 10 Depnd: 8