# siunitx: some options must be in preamble, not with S[?

This is my question for siunitx users: Is it necessary to specify the input-symbols parameter in the preamble, rather than within S[]?

Here's a table produced by my R function outreg in the package rockchalk.

\documentclass[11pt,letterpaper,english]{extarticle}
\usepackage{booktabs}
\usepackage{dcolumn}
\usepackage{array}

\usepackage{siunitx}
%following now in each table
\sisetup{
input-symbols = ( )
}

\begin{document}
\begin{table}
\caption{Still have showAIC argument, as in previous versions}\label{tab:ex5ds}
\centering\begin{tabular}{@{}l*{2}S[input-symbols = ( ),
group-digits = false,
table-format = 3.3,
table-number-alignment = center,
table-space-text-pre = (,
table-space-text-post = {***},
table-align-text-pre = false,
table-align-text-post = false,
parse-units = false]@{}}
\hline
& \multicolumn{1}{c}{Whichever}& \multicolumn{1}{c}{Whatever}\tabularnewline
& \multicolumn{1}{c}{Estimate}& \multicolumn{1}{c}{Estimate}\tabularnewline
& \multicolumn{1}{c}{(S.E.)}& \multicolumn{1}{c}{(S.E.)}\tabularnewline
\hline
\hline
(Intercept)    &403.245*** &29.774*** \tabularnewline
&  (0.618) &  (0.522)\tabularnewline
x1      &1.546*& \multicolumn{1}{c}{\phantom{000}.} \tabularnewline
&  (0.692)   &  \tabularnewline
x2     & \multicolumn{1}{c}{\phantom{000}.} &3.413** \tabularnewline
&   &  (0.512)\tabularnewline
\hline
N& \multicolumn{1}{c}{100}& \multicolumn{1}{c}{100} \tabularnewline
RMSE            &6.121  &5.205   \tabularnewline
$R^2$            &0.048  &0.312   \tabularnewline
adj $R^2$        &0.039  &0.305   \tabularnewline
AIC     &617.694 &617.694\tabularnewline
\hline
\hline

\multicolumn{3}{l}{${* p}\le 0.05$${*\!\!* p}\le 0.01$${*\!\!*\!\!* p}\le 0.001$}\tabularnewline
\end{tabular}
\end{table}
\end{document}


Thanks to the help of members in this group, the output is mostly adequate, IMHO. I cannot know ahead of time how many digits might be used, so I don't rely on table-format to tighten down the alignment. That's why I've got the nagging problems about centering of different sections of table. But this is, honestly, much better than I had before.

I'm asking now about the preamble and sisetup. I want the table markup to be as close to portable as possible, not depending on any preamble details.

I wanted to eliminate entirely the use of sisetup, but if I remove that from this example, it does not compile because the parentheses are not understandable to the compiler:

! siunitx error: "invalid-number"
!
! Invalid numerical input '(0.618)'.
!
! See the siunitx documentation for further information.


Is the preamble sisetup the only correction?

Your syntax of the tabular preamble is faulty. You are using *{2}S[...] But you should put braces around the second argument so that the optional argument of S is processed too:

\documentclass[11pt,letterpaper,english]{extarticle}
\usepackage{booktabs}
\usepackage{dcolumn}
\usepackage{array}

\usepackage{siunitx}
%following now in each table
\sisetup{
% input-symbols = ( )
}

\begin{document}

\begin{table}
\caption{Still have showAIC argument, as in previous versions}\label{tab:ex5ds}
\centering\begin{tabular}{@{}l*{2}{S[
input-symbols = ( ),
group-digits = false,
table-format = 3.3,
table-number-alignment = center,
table-space-text-pre = (,
table-space-text-post = {***},
table-align-text-pre = false,
table-align-text-post = false,
parse-units = false
]}@{}}
&  (0.618) &  (0.522)\tabularnewline
\end{tabular}
\end{table}
\end{document}