Hi everyone!

I have made a spaghetti plot illustrating how a measured diameter change between two time points. I have also calculated the mean diameter at the two time points and would like to add this mean and its 95% confidence interval at each side of the spaghetti plot (graph two way line).

This is how my plot looks today: Array


What I want is mean 95%CI lines on the sides like this:
Array


Do any one know how to do this?


Thanks!
Kind regards,
Anine Lie