greetings,

i would like to fit a regression line on grouped data in the graph provided to kind of like see the trend or model with the increase in concentration/dose. Some equation seem to be displaying but no actual line on the graph to show the regression line. I have used the code below and getting error message . I would like to display the equation of the different varieties and the R square thereof

library(ggplot2)

library(ggpmisc)

formula1 <- avg_AB ~ Dose

ggplot(data = MeanSE_AB, aes(x = Dose, y = avg_AB)) +

geom_point() +

geom_smooth(method = "lm", se = FALSE, formula = formula1) +

stat_poly_eq(aes(label = paste0("atop(", ..eq.label.., ",", ..rr.label.., ")")),

formula = formula1,

parse = TRUE) +

theme_bw(base_size = 16)

Warning messages:

1: Not enough data to perform fit for group 1; computing mean instead.

2: Not enough data to perform fit for group 2; computing mean instead.

3: Not enough data to perform fit for group 3; computing mean instead.