A density plot is a representation of the distribution of a numeric variable. It is a smoothed version of the histogram and is used in the same kind of situation. Here is a basic example built with the ggplot2 library.
Density plots are built in ggplot2 thanks to the
geom_density
geom. Only one numeric variable is need as
input.
# Libraries
library(ggplot2)
library(dplyr)
# Load dataset from github
data <- read.table("https://raw.githubusercontent.com/holtzy/data_to_viz/master/Example_dataset/1_OneNum.csv", header=TRUE)
# Make the histogram
data %>%
filter( price<300 ) %>%
ggplot( aes(x=price)) +
geom_density(fill="#69b3a2", color="#e9ecef", alpha=0.8)
theme_ipsum
The hrbrthemes
package offer a set of pre-built themes
for your charts. I am personnaly a big fan of the
theme_ipsum
: easy to use and makes your chart look more
professional:
# Libraries
library(ggplot2)
library(dplyr)
library(hrbrthemes)
# Load dataset from github
data <- read.table("https://raw.githubusercontent.com/holtzy/data_to_viz/master/Example_dataset/1_OneNum.csv", header=TRUE)
# Make the histogram
data %>%
filter( price<300 ) %>%
ggplot( aes(x=price)) +
geom_density(fill="#69b3a2", color="#e9ecef", alpha=0.8) +
ggtitle("Night price distribution of Airbnb appartements") +
theme_ipsum()