ggplot Fit Line and Lattice Fit Line in R
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Let’s add a fit line to a scatterplot!Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
Fit Line in Base Graphics
Here’s how to do it in base graphics:ols <- lm(Temp ~ Solar.R, data = airquality) summary(ols) plot(Temp ~ Solar.R, data = airquality) abline(ols)
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| Fit line in base graphics in R |
Fit Line in ggplot
And here's how to do it in ggplot:
You can access the info from your regression results through ols$coefficients.
library(ggplot2)
ggplot(data = airquality,
aes(Solar.R, Temp)) +
geom_point(pch = 19) +
geom_abline(intercept = ols$coefficients[1],
slope = ols$coefficients[2])
You can access the info from your regression results through ols$coefficients.
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| Fit line in ggplot in R |
Fit Line in Lattice
In lattice, it's even easier. You don't even need to run a regression; you can just add to the type option.
library(lattice)
xyplot(Temp ~ Solar.R,
data = airquality,
type = c("p", "r"))
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| Fit Line in Lattice in R |
References
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