Hi!
I am having the same problem, everything about pyqtgraph is so fast. But I
have the same problem. I have to plot several vertical lines, at different
heights, using spans depending on the number of different levels I need to
set.
It looks something like this
for key, values in prf.reflections.items():
span = ((float(key) - 1)/prf.nphase, float(key)/prf.nphase)
for val in values:
line = pg.InfiniteLine(pos=val, angle=90, pen=self.pen8, span=span)
self.ui_mainwindow.peaks_graph.addItem(line)
This is painfully slow so I am wondering if there is a better way.
>
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