I'm trying to plot multiple fitted lm lines in an only plot:
library(lme4)
fits <- lmList(Sepal.Length ~ Petal.Width | Species, data=iris)
coefs <- data.frame(coef(fits)); names(coefs) = c("Int", "slopes")
Then I plot all the fits at once via ggplot:
ggplot(iris, aes(x = Petal.Width, y=Sepal.Length)) +
geom_point(shape=1,size = 0.5)+
geom_abline(aes(intercept= Int , slope=slopes), color='grey', data=coefs)
Can someone help me to do it in the base graphics way?
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