Dynamically Adding A Vertical Line To Matplotlib Plot

I'm trying to add vertical lines to a matplotlib plot dynmically when a user clicks on a particular point. import matplotlib.pyplot as plt import matplotlib.dates as mdate class

Solution 1:

You need to update the canvas drawing (self.fig.canvas.draw()):

def onpick(self,event):
    x = event.mouseevent.xdata
    y = event.mouseevent.ydata
    L =  self.ax.axvline(x=x)
    self.fig.canvas.draw()