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How to create a histogram with Y-axis values as count using ggplot2 in R?
To create a histogram with Y-axis values as count using ggplot2 in R, we can follow the below steps −
- First of all, create a data frame.
- Then, use geom_histogram function of ggplot2 package with aes to create the histogram with Y-axis values as count.
Create the data frame
Let's create a data frame as shown below −
> df<-data.frame(x=rnorm(5000)) > head(df,20)
On executing, the above script generates the below output(this output will vary on your system due to randomization) −
x 1 -0.008015477 2 -0.981227322 3 1.144050354 4 0.207177231 5 0.179782914 6 0.380085361 7 -0.828305873 8 -0.909047732 9 1.946699123 10 0.384881892 11 -1.107651249 12 -1.290435936 13 -0.305554288 14 -0.427279557 15 -0.587864723 16 -0.295237215 17 0.178995066 18 0.476328701 19 -0.392095095 20 -1.215651876
Create a histogram with Y-axis values as count using ggplot2
Using geom_histogram function of ggplot2 package to create the histogram with Y-axis values as count for the data in data frame df −
> df<-data.frame(x=rnorm(5000)) > library(ggplot2) > ggplot(df,aes(x))+geom_histogram(aes(y=..count..*10),bins=30)
Output
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