Creating Density Plots
Why Use Density Plots?
A density plot is a smoothed version of a histogram. It is useful to:
-
Understand the distribution of a numeric variable;
-
Compare distributions across groups (like fuel types);
-
Spot peaks, skewness, and spread.
Unlike histograms, density plots estimate the probability of a value occurring within a range.
Basic Syntax for Density Plots in ggplot2
ggplot(data = df, aes(x = variable)) +
geom_density()
For group comparisons, use fill = group_variable and adjust transparency using alpha.
Example: Selling Price Distribution
ggplot(df, aes(x = selling_price)) +
geom_density(fill = "blue") +
labs(title = "Density Plot of Selling Prices",
x = "Selling Price",
y = "Density")
This plot shows how car prices are distributed, revealing where most prices cluster and how prices are spread.
Tak for dine kommentarer!
Spørg AI
Spørg AI
Spørg om hvad som helst eller prøv et af de foreslåede spørgsmål for at starte vores chat
Can you explain the difference between a density plot and a histogram in more detail?
How do I interpret overlapping density curves when comparing groups?
Can you show how to adjust the transparency (alpha) in a density plot?
Awesome!
Completion rate improved to 4Creating Density Plots
Stryg for at vise menuen
Why Use Density Plots?
A density plot is a smoothed version of a histogram. It is useful to:
-
Understand the distribution of a numeric variable;
-
Compare distributions across groups (like fuel types);
-
Spot peaks, skewness, and spread.
Unlike histograms, density plots estimate the probability of a value occurring within a range.
Basic Syntax for Density Plots in ggplot2
ggplot(data = df, aes(x = variable)) +
geom_density()
For group comparisons, use fill = group_variable and adjust transparency using alpha.
Example: Selling Price Distribution
ggplot(df, aes(x = selling_price)) +
geom_density(fill = "blue") +
labs(title = "Density Plot of Selling Prices",
x = "Selling Price",
y = "Density")
This plot shows how car prices are distributed, revealing where most prices cluster and how prices are spread.
Tak for dine kommentarer!
