package siunitx doesnt work with option

Question

I'm using the package siunitx for unit-typesetting. In particular I wanted this expression:

\SI[per=frac,fraction=nice]{2}{\celsius\per\kilo\metre}

unfortunately I get many errors like:

siunitx error: version-1-option
version 1 option 'per' detected

Similarly for fraction

Without the option part it works:

\SI{2}{\celsius\per\kilo\metre}

I'm thinking that is because I'm not using latin but utf8 (inputenc) encoding, but not sure?! Any advice?

Torbjørn T. · Accepted Answer · 2016-09-04T12:42:37.703

8

The names of options in siunitx changed a lot between versions 1 and 2, and you are using the names from version 1, while you have version 2 installed. In version 2.x of siunitx you should use per-mode=fraction, not per=frac. Similarly you should use fraction-function=\sfrac instead of fraction=nice. \usepackage{xfrac} is also required.

(Addendum: clemens points out in a comment below that the nice option may have been referring to the nicefrac package and its \nicefrac macro. The output is similar, if you prefer nicefrac, use \usepackage{nicefrac} instead of loading xfrac, and use fraction-function=\nicefrac.)

The manual can be found at for example: http://texdoc.net/texmf-dist/doc/latex/siunitx/siunitx.pdf

\documentclass{article}
\usepackage{siunitx}
\usepackage{xfrac}
\begin{document}

\SI[per-mode=fraction,fraction-function=\sfrac]{2}{\celsius\per\kilo\metre}

\end{document}

edited Sep 04 '16 at 12:42

answered Sep 03 '16 at 22:43

Torbjørn T.

206,688

do u have the manual for version 2? – Diger Sep 03 '16 at 22:51
I only found: http://www.bakoma-tex.com/doc/latex/siunitx/siunitx.pdf – Diger Sep 03 '16 at 22:52
oh and just by chance... what is the syntax for: [tophrase=dots] or dash for example? – Diger Sep 03 '16 at 22:53
1

http://texdoc.net/texmf-dist/doc/latex/siunitx/siunitx.pdf (or CTAN). You may have it on your system as well, try texdoc siunitx from a command prompt/terminal, – Torbjørn T. Sep 03 '16 at 22:53
@Diger range-phrase=-- for an en dash. Probably \dots instead of -- for dots. – Torbjørn T. Sep 03 '16 at 22:55
BTW: using ur proposal with /sfrac it is telling me: Font shape OT1/cmr/m/n in size 4.19998 not available. size <5> substituted on input like 66 as a warning. – Diger Sep 03 '16 at 22:59
1

@Diger Depends on font setup I think, see How to remove the warnings "Font shape `OT1/cmss/m/n' in size <4> not available" and "Size substitutions with differences" in beamer? If you want to more specific advice, please post a new question. – Torbjørn T. Sep 03 '16 at 23:04
Are you sure nice referred to the xfrac package and not to the nicefrac package and its \nicefrac command? (Of course xfrac allows for customization so it offers more flexibility…) – cgnieder Sep 04 '16 at 11:41
@clemens Ehm, no, I'm not. Had forgotten the existence of that one. – Torbjørn T. Sep 04 '16 at 12:15
@TorbjørnT. which reminds of http://tex.stackexchange.com/q/43119/ and makes me wonder if Todd ever finished his package… :) – cgnieder Sep 04 '16 at 12:36
Is there way of doing the other way around using siunitx? Let's say I want to type 1/2 kg. Can I combine \nicefrac or \sfrac with siunitx? – Gagik Apr 20 '22 at 08:27
@Gagik Don't know offhand, and can't check right now. I suggest look in the manual first, and ask a new question second. – Torbjørn T. Apr 20 '22 at 08:29
@Torbjørn T. I didn't find anything in the manual. I'll post a separate question later today. – Gagik Apr 20 '22 at 09:01

score 3 · Answer 2 · edited Apr 13 '17 at 12:35

You can load the v1 options with

\documentclass{article}
\usepackage[version-1-compatibility]{siunitx}
\begin{document}

\SI[per=frac,fraction=nice]{2}{\celsius\per\kilo\metre}

\end{document}

or could supply a v1 option at load time so the file works with both v1 and v2, for example

\documentclass{article}
\usepackage[per = frac]{siunitx}
\begin{document}

\SI[per=frac,fraction=nice]{2}{\celsius\per\kilo\metre}

\end{document}

However, I would strongly recommend using the v2 options as detailed by Torbjørn T.: there are good reasons for the option name changes.

package siunitx doesnt work with option

2 Answers2