histogram2d / heatmap with z: separate color for empty bins

[ajrouvoet]

2d histograms with histfunc = avg|sum are useful for plotting measurements on irregular 2D grids.
The downside of this approach is that the representation of zero measurements collapses with e.g. n times a measurement of zero.

For these applications it would be useful if there was some way of either treating empty bins separately, or having the ability of setting a custom histfunc.

[etpinard]

That would be really nice to allow for a special no-data color - even heatmap traces could benefit from it.

In the meantime, here's a workaround: http://codepen.io/etpinard/pen/xVoJoj?

[ajrouvoet]

If I were to implement this feature and submit a PR (assuming it wouldn't be too hard), what would be the timeline for it to end up in a release?

[etpinard]

If I were to implement this feature and submit a PR [...] timeline for it to end up in a release

The next minor release (v1.18.0) should be out in about 7 to 10 days. We usually make minor release (i.e. release that add features) every two weeks or so.

(assuming it wouldn't be too hard)

Adding this feature will be similar to and have to touch the same files as PR #868

[gvwilson]

Hi - this issue has been sitting for a while, so as part of our effort to tidy up our public repositories I'm going to close it. If it's still a concern, we'd be grateful if you could open a new issue (with a short reproducible example if appropriate) so that we can add it to our stack. Cheers - @gvwilson