Using R, I would like to plot a linear relationship between two variables, but I would like the fitted line to be present only within the range of the data.
For example, if I have the following code, I would like the line to exist only from x and y values of 1:10 (with default parameters this line extends beyond the range of data points).
x <- 1:10
y <- 1:10
Instead of using
abline(), (a) save the fitted model, (b) use
predict.lm() to find the fitted y-values corresponding to x=1 and x=10, and then (c) use
lines() to add a line between the two points:
f <- lm(y~x) X <- c(1, 10) Y <- predict(f, newdata=data.frame(x=X)) plot(x,y) lines(x=X, y=Y)