siunitx
Simply, radianpersecond doesn't work; all other units does.
\documentclass[twoside]{article}
\usepackage{amsmath}
\usepackage{commath}
\usepackage{siunitx}
\begin{document}
\begin{align}
a&=\SI{1}{cm}\\
\omega&=\SI{1}{\radianpersecond}
\end{align}
\end{document}
The error:
Undefined control sequence. \end{align}
I don't understand why only this unit doesn't work!
I think that this is a bug of TeXstudio. The problem is that TeXstudio has auto-completion support for certain commands hard-coded in, most likely for performance reasons. This can be easily checked by looking at the texstudio.exe in a text editor and searching for \microampere (line 68436 in version 2.9.4).
So I would say this is TeXstudio's bug and you should submit it in their bugzilla. I think this is a case for many other commands, so you could also suggest general cleanup of the hard-coded lists of commands.
Edit: I checked the source of TeXstudio 2.9.4 and really, the file completion/siunitx.cwl contains \microfarad, etc. These files must then be compiled into the binary which is distributed.
The default for group-minimum-digits is 5, the integer 1089 has 4 digits only.
\documentclass{article}
\usepackage{booktabs}
\usepackage{multirow}
\usepackage{siunitx}
\sisetup{
input-ignore={,},
input-decimal-markers={.},
group-separator={,},
group-minimum-digits=4,
}
\begin{document}
{\renewcommand{\arraystretch}{1.2}% for the vertical padding
\begin{tabular}{|cc
|
S[table-format=3.0]
S[table-format=5.0]
|
S[table-format=6.0]
|
}
\hline
& & \multicolumn{2}{c|}{suffers from X} & \\
& & {yes} & {no} & {total} \\
\hline
\multirow{2}{*}{test + for X}
& yes & 90 & 999 & 1,089 \\
& no & 10 & 98,901 & 98,911 \\
\hline
& total & 100 & 99,900 & 100,000 \\
\hline
\end{tabular}% remove unwanted space by line end
}
\end{document}
Best Answer
The package doesn't define
\radianpersecond. Either you typeor add, in the preamble,
and then you'll be allowed to type also
Note: it seems a bug in TeXStudio if its palettes suggest
\radianpersecondas an existing unit.