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?

@Roman wow, that is something I had been looking for for a long time, thanks! — Frans Rodenburg, Apr 08 '21 at 13:23

score 0 · Accepted Answer · answered Apr 08 '21 at 13:21

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.

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