Syntax error How to create facetted histograms using ggplot2 in R?

How to create facetted histograms using ggplot2 in R?

The facetted histograms are the separated histograms created for different categories in a single plot window. We can follow the below steps to create such type of histograms using ggplot2 −

  • First of all, create the data frame.
  • Load the ggplot2 package and create facetted histogram with the help of facet_grid function of ggplot2 package.

Create the data frame

Let's create a data frame as shown below −

 Live Demo

Group<-sample(LETTERS[1:3],2000,replace=TRUE)
x<-rnorm(2000)
df<-data.frame(Group,x)
head(df,30)

On executing, the above script generates the below output(this output will vary on your system due to randomization) −

 Group    x
1 A -0.15109174
2 B 0.79993882
3 C 0.08982681
4 B -0.14506660
5 A -0.11787381
6 C -0.96427342
7 A 1.11687020
8 B -1.07769076
9 C -1.01850658
10 B 0.24430195
11 B -0.15510646
12 A 0.13364920
13 A -0.15671764
14 A -1.96636140
15 B 1.72444566
16 B 0.74713059
17 C -0.98136868
18 C -1.93135045
19 C -0.51990385
20 B -2.15635971
21 B 0.35730736
22 C -0.16965592
23 A 0.82810224
24 B -1.58918990
25 C 0.32902104
26 C -0.08942102
27 B 0.31243311
28 B -0.01585389
29 B -0.78921478
30 A -1.27632182

Creating the facetted histograms

Loading ggplot2 package and creating facetted histograms for values in Group column −

Group<-sample(LETTERS[1:3],2000,replace=TRUE)
x<-rnorm(2000)
df<-data.frame(Group,x)
library(ggplot2)
ggplot(df,aes(x))+geom_histogram(bins=30)+facet_grid(.~Group)

Output

Updated on: 2021-08-13T11:42:00+05:30

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