Ps-contour Plots - HP 50g User Manual

Graphing calculator.

Try also a Wireframe plot for the surface z = f(x,y) = x
Press „ô, simultaneously if in RPN mode, to access the PLOT SETUP
window.
Press ˜ and type 'X^2+Y^2' @@@OK@@@.
Press @ERASE @DRAW to draw the slope field plot. Press @EDIT L@) M ENU @LABEL
to see the plot unencumbered by the menu and with identifying labels.
Press LL@) P ICT 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.

Ps-Contour plots

Ps-Contour plots are contour plots of three-dimensional surfaces described by z
= f(x,y). The contours produced are projections of level surfaces z = constant
on the x-y plane. For example, to produce a Ps-Contour plot for the surface z =
2
2
x
+y
, use the following:
Press „ô, simultaneously if in RPN mode, to access to the PLOT
SETUP window.
Change
TYPE
Press ˜ and type 'X^2+Y^2' @@@OK@@@.
Make sure that 'X' is selected as the
variables.
Press L@@@OK@@@ to return to normal calculator display.
„ò, simultaneously if in RPN mode, to access the PLOT
Press
WINDOW screen.
Change the default plot window ranges to read:
Y-Far: 1, Step Indep: 10, Depnd: 8
Press @ERASE @DRAW to draw the contour plot.
time, so, be patient. The result is a contour plot of the surface. Notice that
the contour are not necessarily continuous, however, they do provide a
good picture of the level surfaces of the function.
to
Ps-Contour.
2
2
+y
and 'Y' as the
Indep:
X-Left:-2, X-Right:2, Y-Near:-1
This operation will take some
Depnd:
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