Get data from lines() function

Question

I have a plot like this (black points): I calculate the average of some points (smoothing - the red points in the plot). Then I can draw with the lines() function a line between these points (blue in the plot). What I want now is the data of the blue line.

Does somebody know how to do this? Is it even possible?

Answer 1

I used the approx function which interpolates between points:

approx(x = r, y = ionizations, n = 1000)