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Awesome! Thanks for that tip. It hadn't occurred to me that that was possible, but, yeah, that makes sense.

I might pick my Canvas experiments back up, then, as R and the other packages are outside the scope of my day-to-day work, but I could see a JS implementation being useful. Thanks again.

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I recommend you try playing with Protovis. Pretty nice for use cases like this.

Or D3, the child of protovis and SVG.

To be pedantic, Protovis did also use SVG; it just had a layer of abstraction that somewhat obscured this, whereas D3's lower-level syntax makes it feel like you're manipulating SVG directly (making it a bit more intuitive to learn if you're already familiar with SVG).

I'll +1 the recommendation though. D3 is (unsurprisingly, coming from Mike Bostock: http://bost.ocks.org/mike/) brilliant.

http://mbostock.github.com/d3/

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