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Pseudo-contour plots, Pseudo-contour plots -30 – HP 48g Graphing Calculator User Manual

Page 330

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Example:

Enter the «/-coordinate of the eyepoint. It must be

at least one unit smaller than the value for Y--NEflR»
above. The greater the difference between YE 5 and
Y-NEFlR s, the “farther away” the plot will appear.

Enter the

2

-coordinate of the eyepoint. Use the

midpoint of the

2

-axis range for the View Volume if you

want the plot “centered” vertically in the display.

Display the Wireframe example plot, WIRE :

2

= x^y — xy^. If necessary, type in TEACH to install the

EXAMPLES directory and then:

Press

fVAR)

fNXT)

23

After plotting, press

(CANCEL) frRfPLOT

) to review the PLOT forms

that generated the plot. Experiment by changing values or settings

and redrawing the plot.

Pseudo-Contour Plots

The Ps-Contour plot type plots a lattice of line segments, each tangent
to a contour of the function (a curve satisfying f’("a;,?/j=constant).
It computes a tangent for each point in the sampling grid. The

Ps-Contour produces a “fast” contour plot, allowing your eye to pick

out the integral curves (contours) without actually plotting them.

23-30 Plot Types

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