1000 points in 500 pixels

The question of plotting a line graph with thousands of data points came up again today. This always puzzled me; if your chart is only 500 pixels wide, why would you try to draw a chart with 1000 points? It would leave only half a pixel for each point. Flash is kewl but it won’t render half pixels and even if it did, rendering 1000 lines in Flash is a little slow.

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