5 steps to import new fonts in R

A summary after reading many StackOverflow posts, now with codes!

image by author: A retro chart generated in R.
image by author: SF Alien Encounters Solid font chart in R

Recently, I was trying to add some retro flavor into my R charts and came across this article. I had a great time exploring the retro themes but I also find it difficult to add the custom fonts into the charts.

This article summarizes the steps I used to import the new fonts into R after reading many Q&A in StackOverflow.

1. Download the new fonts online

There are many free fonts online to download. When you download the fonts, they are typically TTF (True Type font) files in a zip folder.

2. Open the downloaded TTF (True Type font) file (in the zip folder)

Unzip the zipped file and locate the True Type font file within. Double click and install it.

Image by author: Locate the TrueType font file and double click on it.
Image by author: After opening the TTF file, click install in the new window.

3. Open a new R session and install the extrafonts package

Execute the following codes to install the extrafonts package:

#Install extrafont from CRAN will automatically install extrafontdb and Rttf2pt1:

Check this page out for more info on extrafontdb and Rttf2pt1.

4. Import the new fonts into R

Use the font_import function (specify your path) to import the new fonts:

#need to do this everytime a new true font type file is installed on pcfont_import(paths = "C:/Users/urUserName/AppData/Local/Microsoft/Windows/Fonts")Then, R console will prompt: Importing fonts may take a few minutes, depending on the number of fonts and the speed of the system.
Continue? [y/n]
- type y and enter

If you use font_import() only, R will install all the already available fonts such as Arial, Calibri, etc. And when you use the same function for the second time, you might see in the console that R has found FontName for 0 fonts and the newly installed fonts are still nowhere to be found in R.

You might also see this error message if you use font_import() only:

Error in data.frame(fontfile = ttfiles, FontName = "", stringsAsFactors = FALSE) : 
arguments imply differing number of rows: 0, 1

Hence, it is important to direct R into the right path, by stating paths in the font_import() function.

If you are not able to find AppData folder on your pc, check this page out for a short tutorial on how to make the folder visible.

After importing the fonts, you can use extrafont::loadfonts() to check if the new fonts are already imported into R.

5. Load the fonts into plots

Then, use the following codes to load the fonts into the plot output:

# Register fonts for Windows bitmap output

Now that’s a pretty chart!

image by author: Line chart generated in R with SF Alien Encounters Solid fonts

Changing the world with data points, one word at a time. #naturalLanguageProcessing #textMining https://www.linkedin.com/in/feng-yueh-lim-bb5910106/

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