HP 50G, User Manual

Page: 423 / 887

Page 12-40
Θ
Make sure that ‘X’ is selected as the
Indep:
and ‘Y’ as the
Depnd:
variables.
Θ
Press
L @@@OK@@@
to return to normal calculator display.
Θ
Press
„ò
, simultaneously if in RPN mode, to access the PLOT
WINDOW screen.
Θ
Change 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,
Step Indep: 10 Depnd: 8
Θ
Press
@ERASE @DRAW
to draw the three-dimensional surface. You will see the
calculator produce a series of curves on the screen, that will immediately
disappear. When the calculator finishes producing all the y-slice curves,
then it will automatically go into animating the different curves. One of the
curves is shown below.
Θ
Press
$
to stop the animation. Press
@CANCL
to return to the PLOT
WINDOW environment.
Θ
Press
$
, or
L @@@OK@@@
, to return to normal calculator display.
Try also a Ps-Contour plot for the surface z = f(x,y) = (x+y) sin y.
Θ
Press
„ô
, simultaneously if in RPN mode, to access the PLOT SETUP
window.
Θ
Press
˜
and type ‘(X+Y)*SIN(Y)’
@@@OK@@@
.
Θ
Press
@ERASE @DRAW
to produce the Y-Slice animation.
Θ
Press
$
to stop the animation.
Θ
Press
@CANCL
to return to the PLOT WINDOW environment. Then, press
$
, or
L @@@OK@@@
, to return to normal calculator display.
Gridmap plots
Gridmap plots produce a grid of orthogonal curves describing a function of a
complex variable of the form w =f(z) = f(x+iy), where z = x+iy is a complex
variable. The functions plotted correspond to the real and imaginary part of w
=
Φ
(x,y) + i
Ψ
(x,y), i.e., they represent curves
Φ
(x,y) =constant, and
Ψ
(x,y) =
constant. For example, to produce a Gridmap plot for the function w = sin(z),
use the following: