Can I plot multiple channels with different colors in pyqtgraph with ArrayToQPath?
path = pg.arrayToQPath(xdata.flatten(), ydata.flatten(), conn.flatten())
item = QtGui.QGraphicsPathItem(path)
item.setPen(pg.mkPen('w'))
plt.addItem(item)
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apogalacticon
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Mihai Miulescu
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QGraphicsPathItem only supports drawing with a single color, so unfortunately it is necessary to create one item per color. For example, see examples/MultiPlotSpeedTest.py.
If this is not fast enough for you, consider using an OpenGL-based vis. library. VisPy has an example of this in examples/demo/gloo/realtime_signals.py.
Luke
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Hey there Luke, do you know if this is still the case today? Is VisPy providing the pyqtgraph graphics backend? – Nevermore Oct 21 '21 at 03:10
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1No, I"ll update the answer. – Luke Oct 22 '21 at 18:25