siunitx 挤压柱

Question

我有一张表格，其格式如下：

\begin{table}[h!]
    \begin{center}
        \begin{tabular}[t]{cccc}
            \hline
        {Combo} &   {$|r|>0.5$} &   {$n>100$}   &   {$r^2n$} \\
        \hline
        {U-V}   &   0.558545    &   11640   &   3631.36 \\
        {U-R}   &   0.567270    &   11632   &   3743.12 \\
        {U-I}   &   0.579188    &   11626   &   3900.04 \\
        {U-J}   &   0.536106    &   3709    &   1066 \\
        {U-K}   &   0.535644    &   3730    &   1070.19 \\
        {B-V}   &   0.580019    &   11884   &   3998.04 \\
        {B-R}   &   0.574867    &   11763   &   3887.34 \\
        {B-I}   &   0.591288    &   11749   &   4107.7 \\
        {V-U}   &   -0.558545   &   11640   &   3631.36 \\
        {V-B}   &   -0.580019   &   11884   &   3998.04 \\
        {R-U}   &   -0.567270   &   11632   &   3743.12 \\
        {R-B}   &   -0.574867   &   11763   &   3887.34 \\
        {R-W2}  &   -0.535443   &   4022    &   1153.1 \\
        {I-U}   &   -0.579188   &   11626   &   3900.04 \\
        {I-B}   &   -0.591288   &   11749   &   4107.7 \\
        {I-W2}  &   -0.574056   &   4020    &   1324.75 \\
        {J-U}   &   -0.536106   &   3709    &   1066 \\
        {J-W2}  &   -0.577232   &   1943    &   647.401 \\
        {K-U}   &   -0.535644   &   3730    &   1070.19 \\
        {K-W1}  &   -0.512554   &   1938    &   509.136 \\
        {K-W2}  &   -0.591156   &   1960    &   684.953 \\
        {W1-K}  &   0.512554    &   1938    &   509.136 \\
        {W2-R}  &   0.535443    &   4022    &   1153.1 \\
        {W2-I}  &   0.574056    &   4020    &   1324.75 \\
        {W2-J}  &   0.577232    &   1943    &   647.401 \\
        {W2-K}  &   0.591156    &   1960    &   684.953 \\
        \hline
    \end{tabular}
\caption[Best photometric colours from the MgII dataset]{Photometric colours with highest r-value from the MgII dataset.}
\label{table:MgII_colours}
    \end{center}
\end{table}

生产：

但我需要数字列按小数点对齐。从这个问题我尝试将其格式化为

    \begin{table}
    \centering
    \addtolength{\tabcolsep}{-0.3pt}
    \begin{tabular}{
                        @{}
            l
            S[table-format=1.2]
            S[table-format=1.2]
            S[table-format=2.3]         
                        @{}
        }
        \hline
        {Combo} &   {$|r|>0.5$} &   {$n>100$}   &   {$r^2n$} \\
        \hline
        {U-V}   &   0.558545    &   11640   &   3631.36 \\
        {U-R}   &   0.567270    &   11632   &   3743.12 \\
        {U-I}   &   0.579188    &   11626   &   3900.04 \\
        {U-J}   &   0.536106    &   3709    &   1066 \\
        {U-K}   &   0.535644    &   3730    &   1070.19 \\
        {B-V}   &   0.580019    &   11884   &   3998.04 \\
        {B-R}   &   0.574867    &   11763   &   3887.34 \\
        {B-I}   &   0.591288    &   11749   &   4107.7 \\
        {V-U}   &   -0.558545   &   11640   &   3631.36 \\
        {V-B}   &   -0.580019   &   11884   &   3998.04 \\
        {R-U}   &   -0.567270   &   11632   &   3743.12 \\
        {R-B}   &   -0.574867   &   11763   &   3887.34 \\
        {R-W2}  &   -0.535443   &   4022    &   1153.1 \\
        {I-U}   &   -0.579188   &   11626   &   3900.04 \\
        {I-B}   &   -0.591288   &   11749   &   4107.7 \\
        {I-W2}  &   -0.574056   &   4020    &   1324.75 \\
        {J-U}   &   -0.536106   &   3709    &   1066 \\
        {J-W2}  &   -0.577232   &   1943    &   647.401 \\
        {K-U}   &   -0.535644   &   3730    &   1070.19 \\
        {K-W1}  &   -0.512554   &   1938    &   509.136 \\
        {K-W2}  &   -0.591156   &   1960    &   684.953 \\
        {W1-K}  &   0.512554    &   1938    &   509.136 \\
        {W2-R}  &   0.535443    &   4022    &   1153.1 \\
        {W2-I}  &   0.574056    &   4020    &   1324.75 \\
        {W2-J}  &   0.577232    &   1943    &   647.401 \\
        {W2-K}  &   0.591156    &   1960    &   684.953 \\
        \hline
    \end{tabular}
    \caption[Best photometric colours from the MgII dataset]{Photometric colours with highest r-value from the MgII dataset.}
    \label{table:MgII_colours}

\end{table}

但它却做出了这样的事情：

为什么中间两列被挤压了？我对 LaTex 还不太熟悉，对 也非常陌生siunitx。另外，有没有什么方法可以避免在文本列条目周围加上括号？当有很多行时，这有点麻烦。

Answer 1

您只需要在table-formats 中设置适当的值即可。在您的例子中，您必须担心小数点分隔符前后的位数，以及第二列中的符号的存在。

\documentclass{article}

\usepackage{siunitx}
\usepackage{booktabs}

\begin{document}
\begin{table}
  \centering
  \addtolength{\tabcolsep}{-0.3pt}
  \sisetup{group-digits=integer}
  \begin{tabular}{
    @{}
    l
    S[table-format=+1.6]
    S[table-format=5.0]
    S[table-format=4.3]
    @{}
    }
    \toprule
    Combo & {$|r|>0.5$} & {$n>100$} & {$r^2n$} \\
    \midrule
    U-V   & 0.558545    & 11640     & 3631.36  \\
    U-R   & 0.567270    & 11632     & 3743.12  \\
    U-I   & 0.579188    & 11626     & 3900.04  \\
    U-J   & 0.536106    & 3709      & 1066     \\
    U-K   & 0.535644    & 3730      & 1070.19  \\
    B-V   & 0.580019    & 11884     & 3998.04  \\
    B-R   & 0.574867    & 11763     & 3887.34  \\
    B-I   & 0.591288    & 11749     & 4107.7   \\
    V-U   & -0.558545   & 11640     & 3631.36  \\
    V-B   & -0.580019   & 11884     & 3998.04  \\
    R-U   & -0.567270   & 11632     & 3743.12  \\
    R-B   & -0.574867   & 11763     & 3887.34  \\
    R-W2  & -0.535443   & 4022      & 1153.1   \\
    I-U   & -0.579188   & 11626     & 3900.04  \\
    I-B   & -0.591288   & 11749     & 4107.7   \\
    I-W2  & -0.574056   & 4020      & 1324.75  \\
    J-U   & -0.536106   & 3709      & 1066     \\
    J-W2  & -0.577232   & 1943      & 647.401  \\
    K-U   & -0.535644   & 3730      & 1070.19  \\
    K-W1  & -0.512554   & 1938      & 509.136  \\
    K-W2  & -0.591156   & 1960      & 684.953  \\
    W1-K  & 0.512554    & 1938      & 509.136  \\
    W2-R  & 0.535443    & 4022      & 1153.1   \\
    W2-I  & 0.574056    & 4020      & 1324.75  \\
    W2-J  & 0.577232    & 1943      & 647.401  \\
    W2-K  & 0.591156    & 1960      & 684.953  \\
    \bottomrule
  \end{tabular}
  \caption[Best photometric colours from the MgII dataset]{Photometric colours with highest r-value from the MgII dataset.}
  \label{table:MgII_colours}
\end{table}

\end{document}