please support negative numbers

[kmike82]

Negative numbers are currently bucketed with whatever the lowest bucket is. In a data set where 0 is more likely to be median than minimum, this throws off the scale completely

[stormpython]

@kmike82 would you mind including a screenshot of your issue?

[kmike82]

In the heatmap jpg, you can see that the lowest value is 0 (all negative numbers seem to get grouped into 0). I am only showing the lowest 5 aggregations here

In the linechart jpg, you can see that I expect numbers to range between -18000 and 15000

Thanks for your work on this. Your plugins are immensely useful

[stormpython]

@kmike82 thanks! I am looking into the issue.

[stormpython]

Ok, I think I've found the bug here.

This should be changed to:

var colorDomain = [Math.min(0, d3.min(metrics, metric), Math.max(d3.max(metrics, metric), 1)];

I will open a pull request soon.

[kmike82]

Thanks!