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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.

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