Today, we will learn how to create a frequency plot in the R programming language. And it is used a lot in data analysis industry. So, follow this article to know to get more information.
What is the frequency plot in R?
As a frequency plot bins the count of continuous data, it is comparable to a histogram in appearance. But a line plot will be used in place of bars for the display. We will study how to make frequency graphs in R in this article.
How to plot a frequency plot in R?
Load a package
First, we will install and load ggplot2 packages to the plot to plot a frequency plot in R. If you don’t know how to load this package, you can click this link here or run the code below:
# Install the package
install.packages("ggplot2")
# Load the package
library(ggplot2)Create a data
Then we load a ggplot2 package, and we will create data to plot a frequency plot as follows:
library(ggplot2) # Create a data set.seed(255) x <- sample(1:200, 50, replace = TRUE) y <- sample(1:200, 50, replace = TRUE) z <- sample(1:200, 50, replace = TRUE) # Create a dataframe df <- data.frame(x, y, z) # View a data frame head(df)
Output
x y z
1 56 93 102
2 150 37 47
3 31 32 110
4 5 174 93
5 181 47 91
6 171 188 199Plot a frequency plot
Now, we will use the ggplot() function and geom_freqpoly() function in the ggplot2 package to plot a frequency plot in R. Check out the code example below.
library(ggplot2)
# Create a data
set.seed(255)
x <- sample(1:200, 50, replace = TRUE)
y <- sample(1:200, 50, replace = TRUE)
z <- sample(1:200, 50, replace = TRUE)
# Create a dataframe
df <- data.frame(x, y, z)
# Plot a frequency plot
ggplot(diamonds, aes(x = x)) +
geom_freqpoly()Output
Here, bins variables will be automatically chosen by Frequency Plot, which will then plot the proportion of observations that fall into each bin. You can supply the bins parameter to the geom if you want to modify the bin width.
library(ggplot2)
# Create a data
set.seed(255)
x <- sample(1:200, 50, replace = TRUE)
y <- sample(1:200, 50, replace = TRUE)
z <- sample(1:200, 50, replace = TRUE)
# Create a dataframe
df <- data.frame(x, y, z)
# Plot a frequency plot
ggplot(diamonds, aes(x = x)) +
geom_freqpoly(bins = 5)Output
Customize a frequency plot
Here, we will use color, linetype, lwd, … arguments in a geom_frepoly() function to customize a frequency plot as follows:
library(ggplot2)
# Plot a frequency plot
ggplot(diamonds, aes(x = x)) +
geom_freqpoly(
bins = 5,
color = 4,
lwd = 2,
linetype = 4
)Output
Customize the label on a frequency plot
We can use the labs() function in R to customize the label on a frequency plot. Look at the code example below:
library(ggplot2)
ggplot(diamonds, aes(x = x)) +
geom_freqpoly(
bins = 5,
color = 4,
lwd = 2,
linetype = 4
) +
labs(
title = "The Frequency Plot",
x = "X-axis", y = "Y-axis"
)Output
Summary
In conclusion, this article shared with us how to create the frequency plot in R. So, we hope you understand how to use it intensely and apply it in your field. Thank you for reading this post, and please comment if you have any questions.
Have a great day!
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