After drawing data using TH2F with arrow option, can I get information of the arrows somehow?
No, that’s not foreseen. What kind of information would you like to retrieve ?
I have certain potential map.
When plotting this with “ARR” of the TH2F option, arrows appear, which corresponds to directions of gradient of the map.
I want to know the directions.
May be difficult…
This information is not available after arrows are painted. The algorithm is implemented in THistPainter::PaintArrows . May be you can have a look at it and reproduce it in your program ?
thank you very much, I will check it.
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