 # Spaghetti Plot In R: How To Create A Spaghetti Plot

Today, we will learn how to make a spaghetti plot in the R programming language. And it is widely used in the data analysis industry. To learn how to plot it, see this article.

## What is the spaghetti plot in R?

A spaghetti plot is a diagram showing several lines or curves that each reflect the data from a different group. The many lines resemble a spaghetti plate, thus the name “spaghetti plot.” It is common practice to use spaghetti plots to show the trend of several groups across time or space.

## How to create a spaghetti plot in R?

### Create a simple spaghetti plot

Here, If you want to create a spaghetti plot in R, first, you need to install and load the ggplot2 package to create it. You can click here if you don’t know how to load this package or run the code below

# Install and load the 'ggplot2' package
install.packages("ggplot2")
library(ggplot2)

Now, we will create a fake data frame for this example to create a spaghetti plot as follows.

library(ggplot2)

# Create a data frame
set.seed(100)
data1 <- sample(1:10, 10)
data2 <- sample(1:10, 10)
data3 <- sample(1:10, 10)
df <- data.frame(data1, data2, data3)

# View a data frame
head(df)

Output

  data1 data2 data3
1    10    10     4
2     7     7     7
3     6     8     6
4     3     6     2
5     1     9     3

We will use the ggplot() and geom_line() functions to create a spaghetti plot with the data are data frame and data1 above as follows

library(ggplot2)

# Create a data frame
set.seed(100)
data1 <- sample(1:10, 10)
data2 <- sample(1:10, 10)
data3 <- sample(1:10, 10)
df <- data.frame(data1, data2, data3)

# Create the spaghetti plot
ggplot(data = df, aes(x = 1:10)) + geom_line(aes(y = data1))

Output

If you want to plot data2 and data3 data above, we can do it as follows.

# Create the spaghetti plot
ggplot(data = df, aes(x = 1:10)) +
geom_line(aes(y = data1)) +
geom_line(aes(y = data2)) +
geom_line(aes(y = data2))

Output

### Customize a spaghetti plot in R?

In this step, we can use the color argument in the aes() function to change the color in a spaghetti plot.

# Create the spaghetti plot
ggplot(data = df, aes(x = 1:10)) +
geom_line(aes(y = data1, color = "data 1")) +
geom_line(aes(y = data2, color = "data 2")) +
geom_line(aes(y = data3, color = "data 3"))

Output

To add the title, you can use the labs() function. Check out the code example below:

# Create the spaghetti plot
ggplot(data = df, aes(x = 1:10)) +
geom_line(aes(y = data1, color = "data 1")) +
geom_line(aes(y = data2, color = "data 2")) +
geom_line(aes(y = data3, color = "data 3")) +
labs(
title = "The Spaghetti Plot",
x = "X values", y = "Y values"
) +
theme(legend.title = element_blank())

Output

## Summary

In summary, this article helps you discover how to create a spaghetti plot in R and solve your problem. If you have any questions, do write a comment below.

Have a great day!

Posted in R