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axis.title in ggplot2

How to modify axis titles in R and ggplot2.


New to Plotly?

Plotly is a free and open-source graphing library for R. We recommend you read our Getting Started guide for the latest installation or upgrade instructions, then move on to our Plotly Fundamentals tutorials or dive straight in to some Basic Charts tutorials.

Axis Labels

library(plotly)
set.seed(123)

df <- diamonds[sample(1:nrow(diamonds), size = 1000),]

# To set x-axis and y-axis labels use labs()
p <- ggplot(df, aes(carat, price)) +
  geom_point() +
  labs(title = "Diamonds", x = "x-axis -> Carat", y = "y-axis -> Price")

fig <- ggplotly(p)

# Alternatively use
p <- ggplot(df, aes(carat, price)) +
  geom_point() +
  ggtitle("Diamonds") +
  xlab("x-axis -> Carat") +
  ylab("y-axis -> Price")

fig <- ggplotly(p)

fig

Axis Title Size

library(plotly)
set.seed(123)

df <- diamonds[sample(1:nrow(diamonds), size = 1000),]

p <- ggplot(df, aes(carat, price)) +
  geom_point() +
  labs(title = "Diamonds", x = "x-axis -> Carat", y = "y-axis -> Price") +
  theme(plot.title = element_text(size = 50),
        axis.title.x = element_text(size = 20),
        axis.title.y = element_text(size = 20))

fig <- ggplotly(p)

fig

Axis Title Colors

library(plotly)
set.seed(123)

df <- diamonds[sample(1:nrow(diamonds), size = 1000),]

p <- ggplot(df, aes(carat, price)) +
  geom_point() +
  labs(title = "Diamonds", x = "x-axis -> Carat", y = "y-axis -> Price") +
  theme(plot.title = element_text(size = 50, colour = "#668cff"),
        axis.title.x = element_text(size = 20, colour = "#6699ff"),
        axis.title.y = element_text(size = 20, colour = "#ff8080"))

fig <- ggplotly(p)

fig

Inspired by ggplot2 documentation

What About Dash?

Dash for R is an open-source framework for building analytical applications, with no Javascript required, and it is tightly integrated with the Plotly graphing library.

Learn about how to install Dash for R at https://dashr.plot.ly/installation.

Everywhere in this page that you see fig, you can display the same figure in a Dash for R application by passing it to the figure argument of the Graph component from the built-in dashCoreComponents package like this:

library(plotly)

fig <- plot_ly() 
# fig <- fig %>% add_trace( ... )
# fig <- fig %>% layout( ... ) 

library(dash)
library(dashCoreComponents)
library(dashHtmlComponents)

app <- Dash$new()
app$layout(
    htmlDiv(
        list(
            dccGraph(figure=fig) 
        )
     )
)

app$run_server(debug=TRUE, dev_tools_hot_reload=FALSE)