How to extract data from matplotlib plot

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Jakub is right about modifying the Python script to write out the data directly from the source from which it was sent into the plot; that’s the way I’d prefer to do this. But for reference, if you do need to get data out of a plot, I think this should do it

gca().get_lines()[n].get_xydata()

Alternatively you can get the x and y data sets separately:

line = gca().get_lines()[n]
xd = line.get_xdata()
yd = line.get_ydata()

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