procedure stripchart: create stripchart procedure sadvance: advance stripchart procedure smark: mark stripchart
link strpchrt
August 14, 1996; Gregg M. Townsend
Requires: Version 9 graphics
This file is in the public domain.
A stripchart models a continuous roll of paper that is marked along
the right edge while it moves continuously to the left. This is
also known as a chart recording.
stripchart(window, x, y, width, height) creates a stripchart.
sadvance(sc) advances a stripchart.
smark(sc, y1, y2) marks a stripchart.
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stripchart(window, x, y, width, height)
establishes a stripchart and returns a record sc for use with
other procedures.
The chart can be marked by calling smark() or by drawing directly
at location (sc.x, y) where y is arbitrary.
sadvance(sc)
advances the stripchart by one pixel.
smark(sc, y1, y2)
marks the current position of the stripchart from y1 to y2. y2 may
be omitted, in which case a single pixel at (sc.x, y1) is marked.
If the chart has not been advanced since the last mark at y1,
nothing happens.