CurvePoint

class pyqtgraph.CurvePoint(curve, index=0, pos=None)

A GraphicsItem that sets its location to a point on a PlotCurveItem. Also rotates to be tangent to the curve. The position along the curve is a Qt property, and thus can be easily animated.

Note: This class does not display anything; see CurveArrow for an applied example

__init__(curve, index=0, pos=None)

Position can be set either as an index referring to the sample number or the position 0.0 - 1.0