How to change font size of text and axes on R plots

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Apr 20, 2018 in Data Analytics by shams
• 3,660 points
14,700 views

4 answers to this question.

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To change the font size of text, use cex (character expansion ratio).
The default value is 1.
To reduce the text size, use a cex value of less than 1; to increase the text size, use a cex value greater than 1.

> x <- seq(0.5, 1.5, 0.25)
> y <- rep(1, length(x))
> plot(x, y, main="Effect of cex on text size")
> text(x, y+0.1, labels=x, cex=x)
answered Apr 20, 2018 by zombie
• 3,790 points
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  1. Open the Settings app again and tap "Accessibility."
  2. Tap "Display Size."
  3. You'll be shown another slider. Slide it to the right to zoom in more, and make icons and text larger.
answered Dec 16, 2020 by Gitika
• 65,870 points
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Go to the menu in RStudio and click on Tools and then Global Options. Select the Appearance tab on the left. Again buried in the middle of things is the font sizeChange this to 14 or 16 to start with and see what it looks like.

answered Dec 16, 2020 by Rajiv
• 8,880 points
0 votes

To change the font size of text elements, use cex (short for character expansion ratio). The default value is 1. To reduce the text size, use a cex value of less than 1; to increase the text size, use a cex value greater than 1.

> x <- seq(0.5, 1.5, 0.25)
> y <- rep(1, length(x))
> plot(x, y, main="Effect of cex on text size")
> text(x, y+0.1, labels=x, cex=x)

To change the size of other plot parameters, use the following:

  • cex.main: Size of main title

  • cex.lab: Size of axis labels (the text describing the axis)

  • cex.axisSize of axis text (the values that indicate the axis tick labels)

> plot(x, y, main="Effect of cex.main, cex.lab and cex.axis",
+  cex.main=1.25, cex.lab=1.5, cex.axis=0.75)
answered Dec 16, 2020 by Gitika
• 65,870 points

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