""" Demonstrates a way to put multiple axes around a single plot. (This will eventually become a built-in feature of PlotItem) """ import pyqtgraph as pg pg.mkQApp() pw = pg.PlotWidget() pw.show() pw.setWindowTitle('pyqtgraph example: MultiplePlotAxes') p1 = pw.plotItem p1.setLabels(left='axis 1') ## create a new ViewBox, link the right axis to its coordinate system p2 = pg.ViewBox() p1.showAxis('right') p1.scene().addItem(p2) p1.getAxis('right').linkToView(p2) p2.setXLink(p1) p1.getAxis('right').setLabel('axis2', color='#0000ff') ## create third ViewBox. ## this time we need to create a new axis as well. p3 = pg.ViewBox() ax3 = pg.AxisItem('right') p1.layout.addItem(ax3, 2, 3) p1.scene().addItem(p3) ax3.linkToView(p3) p3.setXLink(p1) ax3.setZValue(-10000) ax3.setLabel('axis 3', color='#ff0000') ## Handle view resizing def updateViews(): ## view has resized; update auxiliary views to match global p1, p2, p3 p2.setGeometry(p1.vb.sceneBoundingRect()) p3.setGeometry(p1.vb.sceneBoundingRect()) ## need to re-update linked axes since this was called ## incorrectly while views had different shapes. ## (probably this should be handled in ViewBox.resizeEvent) p2.linkedViewChanged(p1.vb, p2.XAxis) p3.linkedViewChanged(p1.vb, p3.XAxis) updateViews() p1.vb.sigResized.connect(updateViews) p1.plot([1,2,4,8,16,32]) p2.addItem(pg.PlotCurveItem([10,20,40,80,40,20], pen='b')) p3.addItem(pg.PlotCurveItem([3200,1600,800,400,200,100], pen='r')) if __name__ == '__main__': pg.exec()