Hp 49g+ User Manual download pdf (Page 415)

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The coordinates XE, YE, ZE, stand for “eye coordinates,” i.e., the coordinates

from which an observer sees the plot. The values shown are the default values.

The Step Indep: and Depnd: values represent the number of gridlines to be

used in the plot. The larger these number, the slower it is to produce the

graph. For the time being we’ll keep the default values of 10 and 8 for the

Step data.

• Press @ERASE @DRAW to draw the three-dimensional surface. The result is a

wireframe picture of the surface.

• Press @EDIT L @LABEL @MENU to see the graph with labels and ranges. This

particular version of the graph is limited to the lower part of the display.

We can change the viewpoint to see a different version of the graph.

• Press LL@)PICT @CANCL to return to the PLOT WINDOW environment.

• Change the eye coordinate data to read : XE:0 YE:-3 ZE:3

• Press @ERASE @DRAW to see the surface plot.

• Press @EDIT L @LABEL @MENU to see the graph with labels and ranges.

This version of the graph occupies more area in the display than the

previous one. We can change the viewpoint, once more, to see another

version of the graph.

• Press LL@)PICT @CANCL to return to the PLOT WINDOW environment.

• Change the eye coordinate data to read : XE:3 YE:3 ZE:3

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Hp 49g+ User Manual Page 415

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