用途par:
par(font.axis = 2) # 2 means 'bold'
boxplot(1:10)
Run Code Online (Sandbox Code Playgroud)
使用的另一种方式axis(由@joran提出):
boxplot(1:10, yaxt = "n") # suppress y axis
axis(side = 2, font = 2) # 'side = 2' means y axis
Run Code Online (Sandbox Code Playgroud)

您可以使用重置为普通字体par(font.axis = 1).