Poorly typeset μ symbol in plotmath

Question

When using the default font (sans) in base R, symbols like μ are poorly typeset:

plot(1, xlab = bquote("I want sans font here, but serif font for:" ~ (mu * g)))

The g looks larger than the μ symbol.

Setting the font family to serif somewhat improves this:

par(family = "serif)
plot(1, xlab = bquote("I want sans font here, but serif font for:" ~ (mu * g)))

Still not perfect, but much closer.

• If I want the text to be sans, is it possible to change the font family mid-sentence for the symbols?
• If not, is there a better way to typeset μg in plot?

Answer 1

If not, is there a better way to typeset μg in plot

As it turns out, there is indeed a far simpler way to get better typeset symbols:

plot(1, xlab = "It turns out you can just use the character μ directly")

If you save with the right encoding (here I used UTF-8), many symbols can just be used directly in R code and will be printed correctly.

I hope this answer can be useful to others.