Along with all the slick widget packages--[BLT], [ClassyTcl],
and so on--which build in canvas-oriented barcharting, there's
a dead-simple but too-little-known [pure-Tcl] technique for
generating barcharts for Web applications.

[[Show picture of example output [http://phaseit.net/demonstration/barchart.cgi].  Show sample code.
Discuss axes and legends.  Explain alternatives for
generation of color image.  Refer to color codes.]]
[[Probably written up 23 April 2002.]]




A different way to roughly the same visual content is by way of [JavaScript].
This is interesting simply for its architectural distinctiveness.
[http://developer.netscape.com/docs/technote/javascript/graph/] provides examples.


















"[Web special effects]" has related information.









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[['Should show an elementary example of use of [canvas] rectangles to
make bar charts ...]]