math-modeunits
When using the SIstyle package, I noticed that numbers inside \SI{}{} and \num{} appear in a slightly different style than inside $$.
\SI{}{} and \num{} commands come with math mode already?$\SI{}{}$ and $\num{}$.\documentclass{article}
\usepackage{mathspec}
\setmainfont[Mapping=tex-text]{Linux Libertine O}
\setmathfont(Digits,Greek,Latin)[Numbers=OldStyle]{Linux Libertine O}
\begin{document}
$0123456789$
\end{document}
Don Knuth touched on this topic in his article for TUGboat -- "Typesetting Concrete Mathematics". His examples don't include units (for that, the siunitx package is a good choice, as already mentioned), but the method for determining what is math and what isn't is well illustrated otherwise.
(The article is set in Knuth's Concrete fonts, and shows some of the special techniques used in setting that book. Irrelevant for this question, but interesting nonetheless.)
Best Answer
SIstylefollows the local environment font definition. If your text and math fonts (mathrm) are different, it will give different output.I am not doing any further development work (just maintenace) on
SIstyleand everthing has moved over tosiunitxwhere Joseph Wright is doing a fantastic job. I would recommend to change tosiunitx