R: ggplot2, how to get the parameters from a plotted linear model smoother?
- by John
I have a data.frame with 3 time series in it, shown below. When I plot them with a smoother time series, I want to be able to get the parameters of the linear model that I plot, but I can't see how to do that?
> data
day od series_id
1 1 0.10 A1
2 3 1.00 A1
3 5 0.50 A1
4 7 0.70 A1
5 1 1.70 B1
6 3 1.60 B1
7 5 1.75 B1
8 7 1.70 B1
9 1 2.10 C1
10 3 2.30 C1
11 5 2.50 C1
12 7 2.70 C1
data = data.frame (day = c(1,3,5,7,1,3,5,7,1,3,5,7),
od = c(0.1,1.0,0.5,0.7 ,1.7,1.6,1.75,1.7 ,2.1,2.3,2.5,2.7),
series_id = c("A1", "A1", "A1","A1", "B1", "B1","B1", "B1", "C1","C1", "C1", "C1"))
r <- ggplot(data = data, aes(x = day, y = od))
r + stat_smooth(aes(group = series_id, color = series_id),method="lm")
