Greetings,
I'm using the code from this post

with my own data. However, my variable names are longer than those in mtcars. Using that code, how can I rotate the labels on the x-axis 45º to keep them from overlapping?

Advice and suggestions are welcome.

Cheers,
Jason the #rstatsnewbie

You can use the theme() function of ggplot.

DF <- data.frame(L = c("LongLabelAAA", "LongLabelBBB", "LongLabelCCC"),
                 Y = 1:3)
library(ggplot2)
ggplot(DF, aes(L, Y)) + geom_point() +
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust = 1))

Created on 2020-04-29 by the reprex package (v0.3.0)

1 Like

Another option as of ggplot2 version 3.3.0 is to stagger the labels:

library(ggplot2)
library(vcd)  # For Baseball data frame

ggplot(Baseball, aes(team86, error86)) + 
  geom_point() +
  scale_x_discrete(guide=guide_axis(n.dodge=2))

Rplot39

2 Likes

Both of these are excellent!
I really like the second option!
Thank you.
By any chance do you know what "theme_classic()" is and/or does?

EDIT
Also, would you (or anyone) know how to highlight cells with significant p-values in this code?

Cheers,
Jason the #rstatsnewbie

You can add + theme_classic() to your ggplot to see what it does. ggplot has several built-in "themes" that customize the overall look of the plot in various ways. The default theme is theme_grey(). You can change this for all future plots by running, for example:

theme_set(theme_classic())

To see available themes in ggplot, see the help for any theme. For example, run ?theme_classic(). The help page that opens will list all of the available themes. The ggthemes package has more, and you can of course create your own.

To tweak any theme, add a theme() statement to a ggplot after setting the overall theme. For example:

ggplot(mtcars, aes(mpg, hp)) +
  geom_point() +
  theme_classic() +
  theme(axis.text.x=element_text(size=rel(1.1)),
        panel.border=element_rect(fill=NA))

See here and here for web versions of theme help files.

Here are some examples of how ggplots look with various themes.

1 Like

Thank you.
This helps a lot!
I will definitely follow up on your suggestions.

I am sure more questions will come soon enough. :smile::rofl:

~ Jason the #rstatsnewbie

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