Feature request: X values to be any numeric type or even any displayable types.

[nissaba]

I was looking for a chart Lib and we really liked the map, it is really useful.

But this is limited to runtime chart types. I need to display power over distance.

I am working on a cycling app and we want to show to the user the power over distance and alternately over time. So this is good for the second option we want to provide.

We will try to make this work with other type and possibly send a merge request. It would be interesting to on your side of thing you also try to adresse this as are solution may not fully be compatible with your vision.