Statistical and systematics uncertainties with siunitx

Question

I am writing a paper and need to include statistical and systematic errors with units. Using siunitx I would like to be able to do the following (for example)

\SI{1 \pm 0.3 (sys) \pm 0.1 (stat)}{\meter}

But when I do I get the following errors

siunitx error: "misplaced-sign-token"

Misplaced sign token '\pm'

For having multiple \pm (without text) and I get

siunitx error: "invalid-token-in-uncertainty"

Invalid uncertainty in numerical input '1 \pm 0.3 (sys)'.

If I get rid of the stat error.

I guess a minimal example would be

\documentclass{article}
\usepackage{siunitx}
\sisetup{separate-uncertainty=true}
\begin{document}
  \SI{1 \pm 0.3 (sys) \pm 0.1 (stat)}{\meter}
\end{document}

Thanks in advance for the help

Answer 1

Are you perhaps after parse-numbers=false.

\documentclass{article}
\usepackage{siunitx}
\sisetup{separate-uncertainty=true}
\begin{document}
  \SI[parse-numbers=false]{1 \pm 0.3 (sys) \pm 0.1 (stat)}{\meter}
\end{document}