Latex Table Multicolumn Help

Question

I can't wrap my head around multicolumns in latex.

\documentclass{article}
\usepackage{booktabs}
\usepackage{array}
\usepackage{siunitx}
\usepackage{rotating}
\usepackage[colorlinks]{hyperref}
\sisetup{
 % insert global siunitx settings here
 separate-uncertainty=true,
 group-digits=false,
 round-pad=false,
 table-auto-round=true,
 group-separator={},
}
\newcolumntype{T}{S[table-format=2.1]}
\newcolumntype{U}{S[table-format=1.5(1)]}
\begin{document} 
   \begin{tabular}{ S TT UUUU }
     \toprule
     \multicolumn{2}{c}{\textbf{Mass fraction}, \textbf{Concentration}, \textbf{Density relative to \qty{4}{\degreeCelsius} water}} & \
     \multicolumn{4}{c}{(\unit{\percent}) Volume (\unit{\percent}) Mass (\unit{\gram}/(\qty{100}{\mL}))
     \qty{10}{\degreeCelsius} \qty{20}{\degreeCelsius} \qty{25}{\degreeCelsius} \qty{30}{\degreeCelsius}} \
     0    & 0     & 0     & 0.99973(2) & 0.99823(1) & 0.99708(3) & 0.99568(1) \
     4.0  & 5.00  & 3.97  & 0.99258(1) & 0.99103(2) & 0.98984(2) & 0.98839(2) \
     10.0 & 12.40 & 9.84  & 0.98393(2) & 0.98187(1) & 0.98043(2) & 0.97875(2) \
     18.0 & 22.10 & 17.54 & 0.97473(1) & 0.97129(2) & 0.96923(1) & 0.96697(1) \
     25.0 & 30.40 & 24.12 & 0.96665(2) & 0.96168(3) & 0.95895(2) & 0.95607(3) \
     28.0 & 33.90 & 26.90 & 0.96268(3) & 0.95710(1) & 0.95410(3) & 0.95098(2) \
     30.0 & 36.20 & 28.73 & 0.95977(1) & 0.95382(2) & 0.95067(2) & 0.94741(2) \
   \bottomrule
   \end{tabular}
\end{document}

Generated it looks like this:

How can I get the first two rows of my table to look like the one below?

Welcome. // There were many similar questions answered here. Just follow the multicolumn tag you placed and add some more keywords. The tag alone guides you to over 1.000 answers. Also check out the Related entries to the right. — MS-SPO, Jan 15 '24 at 07:23
If you want help you'll have to adapt your MWE to something we can actually compile. Where are the column types S, T, and U defined? From the looks of it, I'd guess you don't want to use \multicolumn in the first column. And if I guess that S is defined by the siunitx package, you'll need {} around your text if you don't use \multicolumn. — Skillmon, Jan 15 '24 at 07:33

score 3 · Answer 1 · answered Jan 15 '24 at 13:23

Setting the multicolumns is quite trivial, but your table does not fit the page.

Here two solution: 1) a sideways table or 2) a table that goes out of the page borders in a box with zero width:

\documentclass{article}
\usepackage{rotating}
\usepackage{booktabs}
\usepackage{array}
\usepackage{siunitx}
\usepackage{rotating}
\usepackage[colorlinks]{hyperref}
\sisetup{
 % insert global siunitx settings here
 separate-uncertainty=true,
 group-digits=false,
 round-pad=false,
 table-auto-round=true,
 group-separator={},
}
\newcolumntype{T}{S[table-format=2.1]}
\newcolumntype{U}{S[table-format=1.5(1)]}
\begin{document}
\begin{sidewaystable}\small\centering
   \begin{tabular}{@{}S TT UUUU@{}}
     \toprule
     \textbf{Mass fraction} &\multicolumn{2}{c}{\textbf{Concentration}}&\multicolumn{4}{c}{\textbf{Density relative to \qty{4}{\degreeCelsius} water}} \
     \cmidrule(lr){2-3}\cmidrule(l){4-7}
     {(\unit{\percent})} & {Volume (\unit{\percent})} & {Mass (\unit{\gram}/(\qty{100}{\mL}))} &
     {\qty{10}{\degreeCelsius}} & {\qty{20}{\degreeCelsius}} & {\qty{25}{\degreeCelsius}} & {\qty{30}{\degreeCelsius}} \
     \midrule
     0    & 0     & 0     & 0.99973(2) & 0.99823(1) & 0.99708(3) & 0.99568(1) \
     4.0  & 5.00  & 3.97  & 0.99258(1) & 0.99103(2) & 0.98984(2) & 0.98839(2) \
     10.0 & 12.40 & 9.84  & 0.98393(2) & 0.98187(1) & 0.98043(2) & 0.97875(2) \
     18.0 & 22.10 & 17.54 & 0.97473(1) & 0.97129(2) & 0.96923(1) & 0.96697(1) \
     25.0 & 30.40 & 24.12 & 0.96665(2) & 0.96168(3) & 0.95895(2) & 0.95607(3) \
     28.0 & 33.90 & 26.90 & 0.96268(3) & 0.95710(1) & 0.95410(3) & 0.95098(2) \
     30.0 & 36.20 & 28.73 & 0.95977(1) & 0.95382(2) & 0.95067(2) & 0.94741(2) \
   \bottomrule
   \end{tabular}
   \caption{Properties of aqueous ethanol solution (Wikipedia)}
\end{sidewaystable}
\begin{table}\small\centering\makebox[0pt]{%
   \begin{tabular}{@{}S TT UUUU@{}}
     \toprule
     \textbf{Mass fraction} &\multicolumn{2}{c}{\textbf{Concentration}}&\multicolumn{4}{c}{\textbf{Density relative to \qty{4}{\degreeCelsius} water}} \
     \cmidrule(lr){2-3}\cmidrule(l){4-7}
      & {Volume } & {Mass } &
     & & & \
     {(\unit{\percent})} & {(\unit{\percent})} & {(\unit{\gram}/(\qty{100}{\mL}))} &
     {\qty{10}{\degreeCelsius}} & {\qty{20}{\degreeCelsius}} & {\qty{25}{\degreeCelsius}} & {\qty{30}{\degreeCelsius}} \
     \midrule
     0    & 0     & 0     & 0.99973(2) & 0.99823(1) & 0.99708(3) & 0.99568(1) \
     4.0  & 5.00  & 3.97  & 0.99258(1) & 0.99103(2) & 0.98984(2) & 0.98839(2) \
     10.0 & 12.40 & 9.84  & 0.98393(2) & 0.98187(1) & 0.98043(2) & 0.97875(2) \
     18.0 & 22.10 & 17.54 & 0.97473(1) & 0.97129(2) & 0.96923(1) & 0.96697(1) \
     25.0 & 30.40 & 24.12 & 0.96665(2) & 0.96168(3) & 0.95895(2) & 0.95607(3) \
     28.0 & 33.90 & 26.90 & 0.96268(3) & 0.95710(1) & 0.95410(3) & 0.95098(2) \
     30.0 & 36.20 & 28.73 & 0.95977(1) & 0.95382(2) & 0.95067(2) & 0.94741(2) \
   \bottomrule
   \end{tabular}%
   }
   \caption{Properties of aqueous ethanol solution (Wikipedia)}
\end{table}
\end{document}

Sideways:

Out of borders:

Latex Table Multicolumn Help

1 Answers1

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