HP 48gII - Manual (Page 422)

Page 12-41
• Press LL@)PICT to leave the EDIT environment.
• Press @CANCL to return to the PLOT WINDOW environment. Then, press
$ , or L@@@OK@@@, to return to normal calculator display.
Y-Slice plots
Y-Slice plots are animated plots of z-vs.-y for different values of x from the
function z = f(x,y). For example, to produce a Y-Slice plot for the surface z =
x
3 -xy 3 , use the following:
• Press „ô, simultaneously if in RPN mode, to access to the PLOT
SETUP window.
• Change TYPE to Y-Slice.
• Press ˜ and type ‘X^3+X*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, Step Indep: 10 Depnd: 8
• 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.
• Press $ to stop the animation. Press @CANCL to return to the PLOT
WINDOW environment.
• 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.