r squared for polynomial regression code example

Example 1: R squared regression in r with ggplot

+ geom_smooth(method=lm, se=F) +
    stat_poly_eq(formula = my.formula, 
                 aes(label = paste(..eq.label.., ..rr.label.., sep = "~~~")), 
                 parse = T)

Example 2: calc_rmse in R

calc_rmse(df_all, date_min = NULL, center = F)