Press „ô, simultaneously if in RPN mode, to access to the PLOT
Press ˜ and type 'X^2+Y^2' @@@OK@@@.
Make sure that 'X' is selected as the
Press L@@@OK@@@ to return to normal calculator display.
„ò, simultaneously if in RPN mode, to access the PLOT
Keep the default plot window ranges to read:
Y-Far: 1, Step Indep: 10, Depnd: 8
Press @ERASE @DRAW to draw the contour plot. This operation will take some
time, so, be patient. The result is a contour plot of the surface.
that the contour are not necessarily continuous, however, they do provide
a good picture of the level surfaces of the function.
Press @EDITL @LABEL @MENU to see the graph with labels and ranges.
Press LL@) P ICT@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) = sin x cos y.
Press „ô, simultaneously if in RPN mode, to access the PLOT SETUP
Press ˜ and type 'SIN(X)*COS(Y)' @@@OK@@@.
Press @ERASE @DRAW to draw the slope field plot.
to see the plot unencumbered by the menu and with identifying labels.
and 'Y' as the
X-Left:-2, X-Right:2, Y-Near:-1
Press @EDIT L@) L ABEL @MENU