ggplot2

Data Visualization

The ggplot2 series: the grammar of graphics, step by step — scatter plots, trend lines, and beyond. Every lesson runs live in your browser, backed by reproducible code.

Learn › Data Visualization › ggplot2

The ggplot2 series teaches the grammar of graphics the way you’ll actually use it — one runnable lesson at a time. Start with the scatter plot and build up to publication-ready figures.

Lessons

A ggplot2 scatter plot of car weight versus miles per gallon, coloured by cylinder count.

Introduction to ggplot2 in R: The Grammar of Graphics

017 minLive

ggplot2 scatter plot of car weight (wt) on the x-axis versus miles per gallon (mpg) on the y-axis; points trend downward.

Scatter Plot in R: A ggplot2 Guide

026 minLive

ggplot2 scatter plot of 53,940 diamonds (carat versus price); points overplot into a dense dark mass that hides where most diamonds lie.

2D Density Plot in R: geom_hex, geom_bin2d & Contours

039 minLive

A ggplot2 scatterplot matrix of the iris measurements built with ggpairs, points and densities coloured by species, per-group correlations printed in the upper panels.

Scatterplot Matrix in ggplot2: The ggpairs() Function

0411 minLive

ggplot2 scatter plot of car weight versus miles per gallon with a blue loess smooth line and a grey confidence band showing a downward curve.

ggplot Smooth Line: Add a Trend Line with geom_smooth

059 minLive

ggplot2 box plot of tooth length (len) by vitamin C dose; length rises with dose across three boxes.

Boxplot in R: A ggplot2 Guide

069 minLive

ggplot2 violin plot of tooth length (len) by vitamin C dose; each violin shows the distribution shape per group.

Violin Plot in R: A ggplot2 Guide

078 minLive

ggplot2 dot plot of tooth length (len) by vitamin C dose; each dose is a centred column of stacked dots that climbs with dose.

Dot Plot in R: A ggplot2 Guide

0810 minLive

ggplot2 stripchart of tooth length (len) by vitamin C dose; each dose is a column of jittered points that climbs with dose.

Stripchart in R: A ggplot2 Guide

0912 minLive

ggplot2 line plot of mean tooth length against vitamin C dose; the line rises from 0.5 to 2 mg/day.

Line Plot in R: A ggplot2 Guide

1011 minLive

ggplot2 line chart of the US personal savings rate (psavert) over time, drawn as a single azure line.

Plot Multiple Lines in R with ggplot2

1110 minLive

ggplot2 area plot of the US personal savings rate over time, filled in brand azure down to the x-axis.

Area Plot in R: A ggplot2 Guide

1214 minLive

ggplot2 bar chart counting the number of cars in each vehicle class in the mpg dataset.

Barplot in R: A ggplot2 Guide

139 minLive

A ggplot2 pie chart splitting daily servings across four food groups — grains, vegetables, fruits, and dairy — each slice a colourblind-safe viridis colour.

Pie Chart in R: A ggplot2 Guide

1414 minLive

ggplot2 plot of mean tooth length by vitamin C dose with vertical error bars showing mean plus or minus one standard deviation.

Error Bars in R: A ggplot2 Guide

1516 minLive

ggplot2 histogram of weight split into 30 bins, with a dashed vertical line marking the mean weight.

Distribution Plot in R: Plot One Variable with ggplot2

1610 minLive

ggplot2 density plot of Old Faithful waiting times, a smooth curve with two clear peaks.

Density Plot in R: A ggplot2 Guide

1710 minLive

Ridgeline plot of iris sepal length with one overlapping density curve per species, each filled a different colour.

Ridgeline Plot in R: ggridges & geom_density_ridges

189 minLive

ggplot2 histogram of tooth length (len); the bars show how many guinea pigs fall in each length range.

Histogram in R: A ggplot2 Guide

1910 minLive

ggplot2 normal QQ plot of tooth length; sample quantiles plotted against theoretical normal quantiles, points roughly along a diagonal.

QQ Plot in R: A ggplot2 Guide

209 minLive

ggplot2 step ECDF of Old Faithful waiting times; the staircase curve rises from 0 to 1 with a steep middle section.

ECDF Plot in R: A ggplot2 Guide

2110 minLive

Two ggplots combined side by side with patchwork: a scatter plot of weight vs mpg and a boxplot of tooth length by dose.

Combine Multiple ggplots in R: A patchwork Guide

227 minLive

ggplot2 box plot of tooth length by vitamin C dose, with default axis tick marks and labels.

ggplot2 Axis Ticks in R: Customize Tick Marks & Labels

2313 minLive

ggplot2 box plot of tooth length by vitamin C dose, showing the default axis titles factor(dose) and len.

Change Axis Labels in R: A ggplot2 Guide

249 minLive

A reference grid of all 26 ggplot2 point shapes, each symbol drawn and labelled with its pch number 0 to 25.

ggplot2 Point Shapes in R: The Complete Guide

2511 minLive

ggplot2 box plot of tooth length by dose with a main title reading Tooth growth by vitamin C dose above the plot.

ggplot2 Title, Subtitle & Caption in R

2611 minLive

ggplot2 scatter plot of iris sepal length versus width, points coloured by species, with the default legend on the right.

ggplot2 Legend in R: Position, Title, and Labels

278 minLive

ggplot2 scatter plot of mpg versus car weight with a dashed red horizontal line at the mean mpg.

Add Reference Lines in ggplot2 (hline, vline, abline)

2810 minLive

ggplot2 scatter plot of car weight versus mileage, zoomed with coord_cartesian to weights 2.5 to 5 and mileage 10 to 25, with a smooth fitted on all data.

ggplot2 Axis Limits & Scales in R

2915 minLive

ggplot2 box plot of tooth length by dose, every box filled with the same brand azure colour.

ggplot2 Colours in R: Change Colours by Group

3013 minLive

ggplot2 line chart of US unemployment from 1967 to 2015 with a default date axis.

Date Axis in R: Format ggplot2 Date Scales

319 minLive

ggplot2 box plot of tooth length by dose under theme_minimal, with the airy gridlines and no panel border that make it the Datanovia house default.

ggplot2 Themes in R: Customize the Look

3214 minLive

ggplot2 box plot of tooth length by dose, faceted into two rows by supplement (OJ and VC).

ggplot2 Facets in R: Multi-Panel Plots

3311 minLive

A default ggplot2 scatter plot of car weight versus miles per gallon on a grey background, with lowercase column names as axis titles and no plot title.

How to Customize a ggplot2 Plot in R: Titles, Axes, Colours, Legend & Theme

3413 minLive

ggplot2 scatter plot of car weight versus mileage with each point labelled by its car name in azure text.

Add Text & Annotations in ggplot2

3512 minLive

Reference chart of the six visible ggplot2 line types — solid, dashed, dotted, dotdash, longdash, twodash — each drawn as a horizontal line labelled by name and number.

Line Types in ggplot2 (R)

3611 minLive

Horizontal ggplot2 box plot of tooth length by vitamin C dose; doses run down the side, length left to right.

Reverse & Flip a ggplot2 Plot (coord_flip)

3710 minLive

ggplot2 scatter plot of car weight versus miles per gallon, with points in brand azure; this plot is saved to a PNG file.

Save a ggplot in R with ggsave()

3814 minLive
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Note

This series covers scatter plots, boxplots, histograms, colors & palettes, and the full ggplot2 grammar.

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Citation

BibTeX citation:
@online{untitled,
  author = {},
  title = {Ggplot2},
  url = {https://www.datanovia.com/learn/data-visualization/ggplot2/},
  langid = {en}
}
For attribution, please cite this work as:
“Ggplot2.” n.d. https://www.datanovia.com/learn/data-visualization/ggplot2/.