display data range for histogram hover text

In this histogram, my data is binned by month. However, when I hover over a bar, I see the midpoint of the data. I wasn’t sure whether to interpret this as the midpoint of the histogram bar or the start of the histogram bar. I would prefer if this was more explicit and said: October 1-September 1

[etpinard]

On the other hand I suspect a lot of users are more interested in clarification, but also when you see Jan 1, 2012 … Jan 5, 2012, 13:45 it could be confusing to know what the bin size actually is, […]

I agree here. Although showing the data range might very useful, making this the default hover behavior is bound to confuse users. Showing the bin range feels less confusing to me.

So if you data is on ten-minute increments, you’d get one-minute precision from the bin, and if your data has increments of 0.05, you’d see 0.01 precision from the bin. I feel like this is acceptable for a first cut though

I agree. It feels acceptable for the first cut. But we should start thinking about those future attributes now. I’m thinking of putting them in the xbins / ybins containers:

x: [/* */],
xbins: {
  hovermode: 'range', // or 'data'
  hoverformat: '' // or maybe hoverprecision ...
}

And a separate question: thoughts on the format, 0 … 0.99 vs 0 - 0.99?

I prefer 0 - 0.99 as long as we use unicode minuses (not simple - dash) to show negative numbers.

[alexcjohnson]

closed by #2113