Histograms

[idontgetoutmuch]

It's important not to confuse a histogram with its graphical rendition; histograms have an existence independent of how they are rendered. Too many graphics libraries conflate the two. I recommend using https://hackage.haskell.org/package/histogram-fill to manipulate histograms. A good plotting package should just concern itself with how to render such structures.

[cchalmers]

You're right, there should certainly be a way to accept already computed histogram data. But I still think there should be helper functions for plotting a histogram from sample data. histogram-fill looks pretty comprehensive but it's also somewhat complicated and not particularly well documented (just now, it took me a good 5-10 mins just to work out to calculate a simple histogram and get the data from it).