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These routines are involved in making (line) plots.

- c
Calligraphy.

- callig
Calligraphy.

- contour
Produce a contour plot.

- coordtrf
Transform between various plot and window-related coordinate systems.

- erase
Erase the screen.

- limits
Set or show limits on the plot coordinate ranges.

- oplot
Add another plot to an existing one.

- pdev
Set the plot device.

- pen
Set the pen width.

- plot
Produce a plot.

- xymov
Draw a line.

The following routines are involved in creating 3D plots (currently under development).

- fit3dcube
Scale a 3D plot so it fits the screen.

- plot3d
Produce a 3D plot.

- project
Project a 3D plot data point into screen coordinates.

- projection
Set the 3D projection parameters.