R 在ggplot中拟合二次曲线
这是我的样本数据。我想在一个绘图中,根据R 在ggplot中拟合二次曲线,r,ggplot2,quadratic,R,Ggplot2,Quadratic,这是我的样本数据。我想在一个绘图中,根据x1绘制y1和y2。这就是我所做的: library(ISLR) library(ggplot2) y1<-scale(Auto$horsepower,scale = T,center=T) y2<-scale(Auto$weight,scale = T,center=T) x1<-Auto$mpg df<-data.frame(y1,y2,x1) p<-ggplot(df,aes(x=x1)) + geom_po
x1
绘制y1
和y2
。这就是我所做的:
library(ISLR)
library(ggplot2)
y1<-scale(Auto$horsepower,scale = T,center=T)
y2<-scale(Auto$weight,scale = T,center=T)
x1<-Auto$mpg
df<-data.frame(y1,y2,x1)
p<-ggplot(df,aes(x=x1)) +
geom_point(aes(y = y1), shape = 16) +
geom_point(aes(y = y2), shape = 2)
它抛出了一个错误:
Warning message:
Computation failed in `stat_smooth()`:
variable lengths differ (found for 'x')
除此之外,stat_smooth命令将只放置一条二次线,而我需要两条二次线
对于y1
和y2
我是如何在R中实现这一点的
谢谢您应该添加两个
stat\u smooth()
调用,并添加aes()
以显示要使用的y
ggplot(df,aes(x=x1)) +
geom_point(aes(y = y1), shape = 16) +
geom_point(aes(y = y2), shape = 2) +
stat_smooth(aes(y = y1),method = "lm", formula = y ~ x + I(x^2), size = 1) +
stat_smooth(aes(y = y2),method = "lm", formula = y ~ x + I(x^2), size = 1, color = "red")
或者制作长格式表格,然后只需调用一次stat\u smooth()
和geom\u point()
library(tidyr)
df_长%聚集(变量,值,y1:y2)
ggplot(df_long,aes(x1,值,颜色=变量))+
几何点()+
统计平滑(method=“lm”,公式=y~x+I(x^2),大小=1)
ggplot(df,aes(x=x1)) +
geom_point(aes(y = y1), shape = 16) +
geom_point(aes(y = y2), shape = 2) +
stat_smooth(aes(y = y1),method = "lm", formula = y ~ x + I(x^2), size = 1) +
stat_smooth(aes(y = y2),method = "lm", formula = y ~ x + I(x^2), size = 1, color = "red")
library(tidyr)
df_long <- df %>% gather(variable, value, y1:y2)
ggplot(df_long, aes(x1, value, color = variable)) +
geom_point() +
stat_smooth(method = "lm", formula = y ~ x + I(x^2), size = 1)