[Tex/LaTex] centering column headers in siunitx table column

siunitxtables

In this table with some big numbers the column headers centered over the decimal point look odd to me. And, too, the columns seem a little too wide.

enter image description here

I've puttered a bit with other answers here and package documentation to little effect. Maybe I haven't looked hard enough – so am asking for help.

Here's the MWE:

\documentclass{article}
\usepackage{booktabs}
\usepackage{siunitx}
\sisetup{input-ignore={,},input-decimal-markers={.},group-separator={,}}

\begin{document}
\begin{tabular}{lSSS}
\toprule
          &            &            & \multicolumn{1}{c}{Natural} \\
Time unit & \multicolumn{1}{c}{Births} & \multicolumn{1}{c}{Deaths} & \multicolumn{1}{c}{increase} \\ 
\midrule
Year  &    134,176,254 &   56,605,700 &    77,570,553 \\
Month &     11,181,355 &    4,717,142 &    6,464,213 \\
Day   &        367,606 &      155,084 &       212,522 \\
Minute&            255 &          108 &           148 \\
Second&            4.3 &          1.8 &           2.5 \\
\bottomrule
\end{tabular}
\end{document}

Best Answer

You need to tell siunitx how many digits are to the left and right of the decimal separator (alignment point). The key table-format does the trick.

Note also that here, a brace group is sufficient to escape the header text. The \multicolumn solution is only required in special cases.

\documentclass{article}
\usepackage{booktabs}
\usepackage{siunitx}
\sisetup{input-ignore={,},input-decimal-markers={.},group-separator={,}}

\begin{document}
\begin{tabular}{lS[table-format=9.1]*2{S[table-format=8.1]}}
\toprule
          &             &            & {Natural}  \\
Time unit & {Births}    & {Deaths}   & {increase} \\
\midrule
Year      & 134,176,254 & 56,605,700 & 77,570,553 \\
Month     &  11,181,355 &  4,717,142 &  6,464,213 \\
Day       &     367,606 &    155,084 &    212,522 \\
Minute    &         255 &        108 &        148 \\
Second    &         4.3 &        1.8 &        2.5 \\
\bottomrule
\end{tabular}
\end{document}

The setting table-format=9.1 indicates that there are 9 digits before the alignment point and 1 digit after it. Similar for the other columns. I've also used *<num>{<col-spec>} notation for repeated common columns to reduce repetition.

enter image description here

Related Solutions

[Tex/LaTex] Color table element with siunitx S column

Simply remove the braces around the \color{red}25.13274123. They are not necessary, and content wrapped in braces are not considered numbers I think, hence not aligned as such.

Also, the \multicolumn is not necessary, it is enough to wrap Value in braces. The reason, as I understand it, is that the e in Value could be considered a part of an exponential number, e.g. 3e8, and siunitx will then try to align it. To protect it from alignment, wrap it in braces. This is mentioned in the manual, section 4.6 Tabular material (the last sentence starting on page 13).

\documentclass{article}
\usepackage{siunitx}
\usepackage{xcolor}
\begin{document}
\begin{table} \centering
    \caption{Table with \texttt{S} column type.}
    \begin{tabular}{cS}
        \hline
        Symbol & {Value} \\
        \hline
        $\pi$ & 3.141592654 \\
        $2\pi$ & 6.283185307 \\
        $4\pi$ & 12.56637061 \\
        $8\pi$ & \color{red}25.13274123 \\
        $e$   & 2.71828182845904524 \\
        $\sqrt{2}$ & 1.41421356237309505 \\
        \hline
    \end{tabular}
\end{table}
\end{document}

enter image description here

[Tex/LaTex] Centering siunitx columns

If you want the decimal marker placed at the center of the column -- and generate lots of wasted whitespace to the left of the leading digit -- then specify a symmetric table-format option, e.g., table-format = 6.6.

enter image description here

\documentclass{scrartcl}
\usepackage{booktabs}
%%\usepackage{multirow} % not needed
\usepackage{siunitx}
    \sisetup{
        detect-mode,
        group-digits            = false,
        input-symbols           = ( ) [ ] - +,
        table-align-text-post   = false,
        input-signs             = ,
        %%decimalsymbol=comma, %% not needed, as implied by `locale=DE` option
        locale = DE,
        }  
\begin{document}
\begin{table}
\centering
\begin{tabular}{@{} cc *{2}{S[table-format = 6.6]} @{}}
\toprule
& Parameter & {Estimate} & {Std.\ Error} \\
\midrule
EUR/USD model & $\hat \sigma_{X}$ & 0,0315 \\
[\defaultaddspace]
GBP/USD model & $\hat \omega$ & 0,000050 & 0,000045 \\ 
& $\hat \alpha_{Y}$ & 0,0860 & 0,0454 \\
& $\hat \beta_{Y}$ & 0,8585 & 0,0838 \\
& $\hat \nu$ & 7,6367 & 2,4094 \\
\bottomrule
\end{tabular}
\end{table}
\end{document}

I think the table looks much better if you set table-format = 1.6:

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] Color table element with siunitx S column

[Tex/LaTex] Centering siunitx columns

Related Question