ggplot2r
I have a really simple question, which I am struggling to find the answer to. I hoped someone here might be able to help me.
An example dataframe is presented below:
a <- c(1:10)
b <- c(10:1)
df <- data.frame(a,b)
library(ggplot2)
g = ggplot(data=df) + geom_point(aes(x=a, y=b)) +
xlab("x axis")
g
I just want to learn how I change the text size of the axes titles and the axes labels.
Change the last line to
q + theme(axis.text.x = element_text(angle = 90, vjust = 0.5, hjust=1))
By default, the axes are aligned at the center of the text, even when rotated. When you rotate +/- 90 degrees, you usually want it to be aligned at the edge instead:
The image above is from this blog post.
Basically you have two options
scale_x_continuous(limits = c(-5000, 5000))
or
coord_cartesian(xlim = c(-5000, 5000))
Where the first removes all data points outside the given range and the second only adjusts the visible area. In most cases you would not see the difference, but if you fit anything to the data it would probably change the fitted values.
You can also use the shorthand function xlim (or ylim), which like the first option removes data points outside of the given range:
+ xlim(-5000, 5000)
For more information check the description of coord_cartesian.
The RStudio cheatsheet for ggplot2 makes this quite clear visually. Here is a small section of that cheatsheet:
Distributed under CC BY.
Best Answer
You can change axis text and label size with arguments
axis.text=andaxis.title=in functiontheme(). If you need, for example, change only x axis title size, then useaxis.title.x=.There is good examples about setting of different
theme()parameters in ggplot2 page.