HP 48gII - Manual (Page 423)

Page 12-42
• Press „ô, simultaneously if in RPN mode, to access the PLOT SETUP
window.
• Press ˜ and type ‘(X+Y)*SIN(Y)’ @@@OK@@@.
• Press @ERASE @DRAW to produce the Y-Slice animation.
• Press $ to stop the animation.
• 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) + iΨ(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:
• Press „ô, simultaneously if in RPN mode, to access to the PLOT
SETUP window.
• Change TYPE to Gridmap.
• Press ˜ and type ‘SIN(X+i*Y)’ @@@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, XXLeft:-1 XXRight:1, YYNear:-1, yyFar: 1, Step Indep: 10 Depnd: 8
• 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.
• Press @EDIT L@LABEL @MENU to see the graph with labels and ranges.
• Press LL@)PICT @CANCL to return to the PLOT WINDOW environment.