[AYBABTME]

The type of chart I've found most useful is heat map charts, and none of the charting library I've looked at provide that:

Here's an example from a Datadog dashboard: https://cloud.githubusercontent.com/assets/1189716/4064956/6...

I wish such a chart style was more common, it's so much more useful than a typical line chart of the median/p9x. Unfortunately, I'm not familiar enough with D3 and such to write my own; it would likely be crap.

[dangets]

I don't think it should be too difficult (not saying that d3 doesn't have a learning curve). There are some examples on the d3 gallery that would probably be close.

http://bl.ocks.org/mbostock/4060606 http://www.trulia.com/trends/2011/09/house-hunter-by-day-not... http://prcweb.co.uk/circularheatchart/ http://bl.ocks.org/tjdecke/5558084

Heck if you point me to a stock dataset I could probably code up a simple example that you could tweak. (no promises though ;)

[ylem]

For work, we had to fork jqplot to add features like heatmaps, zooming, etc.: https://github.com/scattering/jqplot.science

We also have the notion of "interactors" which allow you to add draggable widgets to a plot: http://ncnr.nist.gov/instruments/magik/calculators/calcR_wf....

To see the heatmap in action, you can look at: http://ncnr.nist.gov/ipeek/singleplotwindow.html?instrument=...

There are of course glitches, but hopefully you find some of this useful!

[chenster]

phpChart (http://phpchart.org) is a higher level charting library for jqplot if you don't wan to spend days to learn custom styling and scripting.

[sendmorbutt]

We made a decision to go with phpChart in June. It works well in our use case. We can still add custom javascript when something is outside its offered feature set.

[pwang]

Heatmaps are fairly easy to do with Bokeh, for instance: http://bokeh.pydata.org/docs/gallery/unemployment.html

[saraid216]

Eh. In D3, just transform the data into X/Y coordinates, create a DIV for each one, and then change the background color based on the desired value.

I think it's d3.scale.color to automatically set up a gradient you plug a value into and get a color out.

[corford]

Epoch can do realtime heatmaps: http://fastly.github.io/epoch/real-time/#heatmap

[AYBABTME]

Looks pretty much like what I'm looking for, thanks!

[bradleyboy]

Highcharts (free for non-commercial) has heat maps:

http://www.highcharts.com/demo/heatmap

[mef51]

you may be able to reproduce a heatmap using this d3 extension.. it's called bubble matrix but both heatmaps and this bubble matrix are meant for displaying two dimensions of data

https://github.com/benbria/d3.chart.bubble-matrix