Feature request: Implement sparkline graphs

[peterbrescia]

In the roadmap, last updated over a year ago, it says sparklines will be added as a graph type somewhere in version 2. Is this still a planned feature, and if so is there a specific version that this is likely to be included in?

Sparklines, especially if featuring a summary statistic like a percentage change, would be a very useful feature!

[gordonwoodhull]

Sorry, that was added by a previous maintainer who is no longer here, so I'm not entirely sure what was intended.

Aren't sparklines just small charts in spans without any axes?

[peterbrescia]

Apologies for not being clearer. Yes, sparklines are just small charts with no axes. The thing about summary statistics is tangential and unrelated to this.

[gordonwoodhull]

I think this functionality is available and we just need a decent example. It would take some troubleshooting, mostly.

The summary statistic can be done with a renderlet or pretransition hook, too, say adding a highlighted point and some text.

[edmapd]

@gordonwoodhull here's an example from excel if helpful

sparklines.xlsx

Also, thoughts from the originator of the idea: http://www.edwardtufte.com/bboard/q-and-a-fetch-msg?msg_id=0001OR

[gordonwoodhull]

Thanks @edmapd, I'm a fan and have read the books.

All that is required here is

• to use a span instead of a div for the chart
• use very small width and height
• a little CSS to hide the axes

Here's an example. Note it has some very stupid filtering between the charts, just to show that's possible.

[edmapd]

Very nice!

The filtering is adorable :)