How to Rotate Axis Labels in ggplot2?.

Axis labels on graphs must occasionally be rotated.

Let’s look at how to rotate the labels on the axes in a ggplot2 plot. 

Let’s begin by creating a basic data frame and the plot.

Rotate Axis Labels in ggplot2

library(ggplot2)
p <- ggplot(ToothGrowth, aes(x = factor(dose), y = len,fill=factor(dose))) +
geom_boxplot()
p

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Rotation based on vjust and hjust

p + theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))

To ensure that the labels are close enough to the plot, you may need to alter the vjust and hjust values depending on the angle at which you rotate the labels.

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Change axis tick mark labels

p + theme(axis.text.x = element_text(face = "bold", color = "red",
size = 12, angle = 45),
axis.text.y = element_text(face = "bold", color = "blue",
size = 12, angle = 45))

Remove x and y axis tick mark labels

Let’s Remove x and y-axis tick mark labels

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p + theme(axis.text.x = element_blank(),  axis.text.y = element_blank())

Remove axis ticks and tick mark labels

p + theme(axis.text.x = element_blank(),  axis.text.y = element_blank(),
axis.ticks = element_blank())

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