Re: [R] How to predict intersection value between regression and line in R?

Thank you. Sorry for the cyc variable, I simplified in 35 in the first call but not in the second. The actual value would be ``` df = data.frame(Cycles = 1:35, Values = val[1:35) ``` I'll try your suggestion. Best regards On Fri, Apr 11, 2025 at 8:05 PM Duncan Murdoch wrote: > > Your example does

[R] ggplot trouble when I combine a layer with group and a layer with group=1

Dear RHelp-list,   I want to combine with ggplot2 a layer where I compare   three regressions and a layer where I just display three   new samples to evaluate their locations to the regressions lines.   (the mock data is placed at the end of the mail) # 1. comparison of the three regressions (i