How can I draw text on a haskell chart graphics?

Question

I would like to draw some label besides points on a XY chart drawn using Chart with diagrams backend in Haskell. Eg. I have data like:

data = [("foo", 1,2), ("bar", 1, 3), ... ]

and would like to draw labels foo and bar at or near coordinates (1,2) and (1,3) respectively.

score 2 · Accepted Answer · answered Jan 15 '14 at 14:48

2

You can do this using PlotAnnotation. Something like:

toPlot $ def & plot_annotation_values .~ [(1, 2, "foo"), (1, 3, "bar"), ... ]

answered Jan 15 '14 at 14:48

bergey

Thanks. It works but I am still puzzled on how to configure font attributes... Will have to look a little bit more into it. Could you please tell me where you took that knowledge from? I was not able to find documents on the wiki site and the featured examples do not plot annotations (AFAICT). – insitu Jan 15 '14 at 18:08
I just went to Hackage and browsed the per-module docs there. – bergey Jan 15 '14 at 20:24
Thanks for your patience and answer. Will try to be less impatient and search more thoroughly next time... – insitu Jan 15 '14 at 21:47
No worries. It took me a long time to get used to Haskell's current state of documentation for (almost) every function, but few tutorials. – bergey Jan 16 '14 at 03:24
Well, it is just that Chart is large and I did not have much time. But having been programming Haskell for more than ten years, I am quite aware that documentation, examples and practical tutorials are not always valued... But this is overgeneralisation. – insitu Jan 16 '14 at 21:22

1 Answers1