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I want to draw a line passing through a point P and Q on an elliptic curve.

plotE = E.plot()
plotE += line([P.xy(),R.xy()],color='red')

Using this only draw a line segment from P to Q. How can I draw a line? I've looked on the doc but did not see an option for this. Any solution?

I want to draw a line passing through a point P and Q on an elliptic curve.

E = EllipticCurve([0,0,0,4,20])
print(E)
E.plot(xmin=-20, xmax=20, ymin=-20, ymax=20)
plotE = E.plot()
P=E(1,5)
R = - (P + P)
plotE += line([P.xy(),R.xy()],color='red')

Using this only draw a line segment from P to Q. How can I draw a line? I've looked on the doc but did not see an option for this. Any solution?