R：更改 hist 和 barplot 的字体

Question

I tried to change the font of my hist and barplot (with R), but I can not succeed... I tried the extrafont package but I can not find how to change it...

How can I simply change all of the fonts for all of my graph (hist and barcharts) ? I only have axis labels and of course the numbers on the axis.

Answer 1

On Windows, set it globally like this

windowsFonts(times = windowsFont("Times New Roman")) 
par(family = "times", font = 2, font.lab = 2, font.axis = 2)
barplot(1, names.arg = 1, xlab = "x", ylab = "y")
hist(rnorm(1:100))

or path it to the plotting function itself like this

barplot(1, names.arg = 1, xlab = "x", ylab = "y", family = "serif", font = 2, font.lab = 2, font.axis = 2)

Have a look at the help ?par for further info on the parameters like font.lab.

Answer 2

It is easy for people to point to the par help page. But at least for R version 3.5.2 the solution is not on that page!

In the barplot the x-axis is technically not an axis since it uses the names of the supplied vector. So, you need to set cex.names = 0.5 for smaller text. Alternatively, you can use a larger value for larger text.

a <- c(1:3)
names(a) <- c(1:3)
barplot(a, cex.names = 2)

Good luck!