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Affects: HPGL output to file or plotter
This option specifies whether linear interpolation should be performed on the plotted data. If disabled, only the data points are plotted, as discrete dots, which can cause excessive pen wear. If enabled, the data points will be interconnected by line segments, allowing continuous pen motion.
A separate option, "Interpolation", controls interpolation for the normal screen display. It is a separate option because it is common to want interpolation enabled for plotting, but not for the screen display.
If the "Extend interpolation" option is disabled, the program interpolates only between points that are shown on the graph, and completely ignores points that are clipped out because they are too high or too low. This may give certain graphs a very "broken" appearance. If both the "Plot Interp." and the "Extend interpolation" options are enabled, then the program will perform partial interpolation between clipped points; line segments are drawn toward these points, up to the top or bottom of the graph.
| Key sequence | Parameter | Initial Value |
|---|---|---|
| <Esc>PI | Plot interp. | Y |
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Copyright © 2019 G. R. Detillieux, Spinal Cord Research Centre, The University of Manitoba.