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R language uses circular statements to draw multiple pictures at one time

2022-07-17 23:18:00 【A Qiang Zhen】

R Language uses circular statements to draw multiple pictures at one time

First load the package ,patchwork It is used to display multiple pictures in one interface
See this article for details

library(ggplot2)
library(patchwork)

With data iris For example , Respectively by Sepal.Length Sepal.Width Petal.Length Petal.Width Draw a violin diagram for the ordinate
Articles related to violin pictures

iris
ggplot(iris,aes(Species,Sepal.Length))+
  geom_violin(aes(col=Species))

Insert picture description here
Draw pictures with circular statements ：
Extract column names first ：

a <- colnames(iris[,-5]);a
for (i in 1:4){
    
  F0 <- ggplot(iris,aes_string("Species",a[2]))+
    geom_violin(aes(col=Species))
  pic <- paste0("F",i)
  assign(pic,F0)
}
(F1+F2)/(F3+F4)

Insert picture description here

Be careful ： It's used here aes_string instead of aes,Species Be sure to use double quotation marks , When we extract the vertical coordinates, there are double quotation marks , Don't add this