How to use R language ggplot2 to remove gray background and add ellipse and circle grouping boundary
In this issue, Xiaobian will bring you about how to use R language ggplot2 to remove gray background, add oval and circular grouping boundaries, the article is rich in content and professional analysis and description for everyone, after reading this article I hope you can gain something.
Legend for General Bubble Plot
The sample data is directly from the built-in iris dataset
library(ggplot2)
colnames(iris)
ggplot(iris,aes(x=Sepal.Length,y=Sepal.Width))+
geom_point(aes(size=Petal.Length,color=Species))+
guides(color=F)+
scale_size_continuous(range = c(5,10),
breaks = c(2,4,6))
image.png
image.png How does that become a hollow circle like this?
I began to think complicated, thinking that I need to go to the legend related parameters to set, originally directly change the shape of the point is good, to the shape parameter set to 21 is good
ggplot(iris,aes(x=Sepal.Length,y=Sepal.Width))+
geom_point(aes(size=Petal.Length,color=Species),
shape=21)+
guides(color=F)+
scale_size_continuous(range = c(5,10),
breaks = c(2,4,6))
image.png
In this case, the points on the graph also become hollow. If you want to set the points on the graph to solid, you can add a fill parameter.
ggplot(iris,aes(x=Sepal.Length,y=Sepal.Width))+
geom_point(aes(size=Petal.Length,
color=Species,
fill=Species),
shape=21)+
guides(color=F,fill=F)+
scale_size_continuous(range = c(5,10),
breaks = c(2,4,6))
image.png
Here you can also see that the legend has a gray background. What if you want to remove it? The answer is to set the legend.key parameter in the theme
ggplot(iris,aes(x=Sepal.Length,y=Sepal.Width))+
geom_point(aes(size=Petal.Length,
color=Species,
fill=Species),
shape=21)+
guides(color=F,fill=F)+
scale_size_continuous(range = c(5,10),
breaks = c(2,4,6))+
theme(legend.key = element_blank())
image.png
What is the Chinese meaning of key here?
image.png Add elliptical grouping boundaries
The stat_ellipse() function is used
ggplot(data=iris,aes(x=Sepal.Length,
y=Sepal.Width,
color=Species))+
geom_point()+
theme(legend.key = element_blank())+
stat_ellipse(aes(x=Sepal.Length,
y=Sepal.Width,
color=Species,
fill=Species),
geom = "polygon",
alpha=0.5)
image.png Add a circular grouping boundary
The geom_circle() function in ggforce is used.
library(ggplot2)
library(ggforce)
colnames(iris)
ggplot()+
geom_point(data=iris,aes(x=Sepal.Length,
y=Sepal.Width,
color=Species))+
theme(legend.key = element_blank(),
panel.background = element_blank(),
panel.border = element_rect(color="black",
fill = "transparent"))+
geom_circle(aes(x0=5,y0=3.5,r=1),
fill="blue",
alpha=0.2,
color="red")+
xlim(2,8)+
ylim(2,8)+
geom_circle(aes(x0=7,y0=3,r=1),
fill="green",
alpha=0.2,
color="red")
The above is how to use R language ggplot2 to remove the gray background, add elliptical and circular grouping boundaries, if there is a similar doubt, may wish to refer to the above analysis for understanding. If you want to know more about it, please pay attention to the industry information channel.
