(click for the full-scale resolution images)
Several reasons to move away from Flotr2, actually – it supports more line-chart modes, it’s totally geared towards time-series data (no need to adjust/format anything), and it has splendid cursor and zooming support out of the box. Oh, and swipe support on tablets!
Zooming in both X and Y directions can be done by dragging the mouse inside the graph:
You’re looking at step-style line drawing, by the way. There are some quirks in this dataset which I need to figure out, but this is a much better representation for energy consumption than connecting dots by straight lines (or what would be even worse: bezier curves!).
Temperatures and other “non-rate” entities are better represented by interpolation:
BTW, it’s surprisingly tricky to graphically present measurement data – more tomorrow…