PyPlot: how to plot up-down arrows in a figure?

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Maybe this example will get you started:

https://gist.github.com/gizmaa/7214002#plot-annotation

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Not sure directly with PyPlot, but if you use Plots.jl with PyPlot as the backend, you can use a scatter plot as set the markers. The details for how to do this stuff is shown here:

https://juliaplots.github.io/examples/pyplot/

4

thanks very much!

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