I am making plot in PyX.
To get (in LaTex language)
\mathrm{a}
you use
\rm{a}
(in PyX language).
I wanna get (in LaTex language)
\mathbb{a}.
How to do it in PyX language? Attempt of
\bb{a}
gives error message.
You need to enable LaTeX by
text.set(text.LatexRunner)
By default PyX uses plain TeX.