HP 50G, User Manual

Page: 424 / 887

Page 12-41
Θ
Press
„ô
, simultaneously if in RPN mode, to access to the PLOT
SETUP window.
Θ
Change
TYPE
to
Gridmap.
Θ
Press
˜
and type ‘SIN(X+i*Y)’
@@@OK@@@
.
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
Keep the default plot window ranges to read:
X-Left:-1, X-Right:1, Y-Near:-1 Y-
Far: 1, XXLeft:-1 XXRight:1, YYNear:-1, yyFar: 1,
Step Indep: 10 Depnd: 8
Θ
Press
@ERASE @DRAW
to draw the gridmap plot. The result is a grid of functions
corresponding to the real and imaginary parts of the complex function.
Θ
Press
@EDIT L @LABEL @MENU
to see the graph with labels and ranges.
Θ
Press
LL @)PICT @CANCL
to return to the PLOT WINDOW environment.
Θ
Press
$
, or
L @@@OK@@@
, to return to normal calculator display.
Other functions of a complex variable worth trying for Gridmap plots are:
(1) SIN((X,Y)) i.e., F(z) = sin(z) (2)(X,Y)^2 i.e., F(z) = z
2
(3) EXP((X,Y)) i.e., F(z) = e
z
(4) SINH((X,Y)) i.e., F(z) = sinh(z)
(5) TAN((X,Y)) i.e., F(z) = tan(z) (6) ATAN((X,Y)) i.e., F(z) = tan
-1
(z)
(7) (X,Y)^3 i.e., F(z) = z
3
(8) 1/(X,Y) i.e., F(z) = 1/z
(9)
√
(X,Y) i.e., F(z) = z
1/2
Pr-Surface plots
Pr-Surface (parametric surface) plots are used to plot a three-dimensional
surface whose coordinates (x,y,z) are described by x = x(X,Y), y = y(X,Y),
z=z(X,Y), where X and Y are independent parameters.