我一直在寻找这一段时间,但无法获得解决方案。如何格式化和移动ggplot中每个组的多元回归方程?
This is the data I have
Display Frustration Neck Angle
1 Microscope 55 40.77672
2 Microscope 70 53.74905
3 Loupe 10 52.41799
4 Loupe 5 62.36514
5 Video 25 49.83489
6 Video 10 68.19686
my current code
lm_eqn <- function(df){
m <- lm(Neck ~ Frustration, df);
eq <- substitute(italic(y) == a + b %.% italic(x)*","~~italic(r)^2~"="~r2,
list(a = format(coef(m)[1], digits = 2),
b = format(coef(m)[2], digits = 2),
r2 = format(summary(m)$r.squared, digits = 3)))
as.character(as.expression(eq));
}
eq <- ddply(df.frus,"Display",lm_eqn)
p<- ggplot(df.frus,aes(x=Frustration,y=Neck,col=Display))+geom_jitter(width=0.5)+geom_smooth(method="lm",se=FALSE)
p+geom_text(data=eq,aes(x = 30, y = 80,label=V1), parse = TRUE)
现在我能够生成每个组回归线和R^2倍的值,但它们是在同一个地方,我应该怎么格式化显示这些方程的地方吗?
非常感谢所有帮助!!!!
什么是您预期的输出? – mtoto
[ggplot2:在图上添加回归直线方程和R2]可能重复(http://stackoverflow.com/questions/7549694/ggplot2-adding-regression-line-equation-and-r2-on-graph) – Vlo
@mtoto我只是更新了我的情节,这些方程式显示在同一个地方,我怎样才能让它们移动以便我们看到? –