I've been doing some work with d3 <http://d3js.org/> recently. It's certainly been an education... Out of the box, it supports several different types of interpolation between two points <https://github.com/mbostock/d3/wiki/SVG-Shapes#line_interpolate>, which I've found quite useful. It allows me to focus on assembling my data, and not worry about transforming it to achieve the desired visual effect. For example, in trading markets, once a trade is seen at a certain price, X, it's useful to think of that price holding until the next trade price seen at Y. With d3's "step-after" interpolation, given two points, (t0, X) and (t1, Y), instead of drawing a single line between the two points, it draws a horizontal line between (t0, X) and (t1, X), then a vertical line between (t1, X) and (t1, Y).
I've don't a bit of searching, but didn't find anything obviously like this in matplotlib. Does it support such a feature? Thx, Skip
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