使用 \cmidrule 和 datatool 表进行垂直间距

Question

cmidrule当我在由包生成的表中有一个空行时，我想插入一个，datatool并使用\bottomrule。这两者都会在行上方产生多余的垂直空间：

我该如何消除这两个多余的垂直空间呢？

代码：

\documentclass{article}
\usepackage{datatool}
\usepackage{booktabs}

\usepackage{filecontents}
\begin{filecontents*}{foo.dat}
    Line1,   AAAA
    Line2,   BBBB
    ,
    Line4,   DDDD
    Line5,   EEEE
\end{filecontents*}

\newcommand{\PrintDTLTable}[1]{%
    % #1 = database to search
    \begin{tabular}{c c}\toprule
        Label & Cost  \\\cmidrule{1-2}
    \DTLforeach{#1}{%
        \RowID=RowID,%
        \Label=Label%
    }{%
        \DTLifnullorempty{\RowID}{%
            \\%[-\baselineskip]
            %\vspace*{-\baselineskip}%
            \cmidrule(lr){1-2}%
        }{%
            \RowID & \Label \\
        }%
    }%
    \\\bottomrule
    \end{tabular}
}%

\begin{document}
\DTLloaddb[noheader,keys={RowID,Label}]{myDB}{foo.dat}

\PrintDTLTable{myDB}
\end{document}

Answer 1

在 中tabular，\baselineskip设置为0pt，但您可以使用\normalbaselineskip来纠正额外的空格：

\documentclass{article}

\usepackage{datatool}
\usepackage{booktabs}

\usepackage{filecontents}
\begin{filecontents*}{foo.dat}
  Line1,   AAAA
  Line2,   BBBB
  ,
  Line4,   DDDD
  Line5,   EEEE
\end{filecontents*}

\newcommand{\PrintDTLTable}[1]{%
  % #1 = database to search
  \begin{tabular}{c c}\toprule
    Label & Cost  \\\cmidrule{1-2}
    \DTLforeach{#1}{%
      \RowID=RowID,%
      \Label=Label%
    }{%
      \DTLifnullorempty{\RowID}{%
        \\[-\normalbaselineskip]
        \cmidrule(lr){1-2}%
      }{%
        \RowID & \Label \\
      }%
    }%
    \\[-\normalbaselineskip]
    \bottomrule
  \end{tabular}
}%

\begin{document}
\DTLloaddb[noheader,keys={RowID,Label}]{myDB}{foo.dat}

\PrintDTLTable{myDB}
\end{document}

Answer 2

按照惯例，最好提前建造好桌体并立即交付。

\begin{filecontents*}{\jobname.dat}
    Line1,   AAAA
    Line2,   BBBB
    ,
    Line4,   DDDD
    Line5,   EEEE
\end{filecontents*}

\documentclass{article}
\usepackage{datatool}
\usepackage{booktabs}

\newcommand{\PrintDTLTable}[1]{%
  % #1 = database to search
  \def\tabledata{}%
  \DTLforeach{#1}{%
    \RowID=RowID,%
    \Label=Label%
  }{%
    \DTLifnullorempty{\RowID}{%
      \edef\tabledata{\expandonce{\tabledata}\noexpand\cmidrule(lr){1-2}}
    }{%
      \edef\tabledata{%
        \expandonce{\tabledata}%
        \expandonce{\RowID} &
        \expandonce{\Label} \noexpand\\%
     }%
   }%
 }%
 \begin{tabular}{c c}\toprule
 Label & Cost  \\\cmidrule{1-2}
 \tabledata
 \bottomrule
 \end{tabular}
}

\begin{document}
\DTLloaddb[noheader,keys={RowID,Label}]{myDB}{\jobname.dat}

\PrintDTLTable{myDB}
\end{document}

Answer 3

解决方法是在中间和底部规则之前设置负垂直空间[-2.75ex]

\documentclass{article}
\usepackage{datatool}
\usepackage{booktabs}

\usepackage{filecontents}
\begin{filecontents*}{foo.dat}
    Line1,   AAAA \\
    Line2,   BBBB \\ [-2.75ex]
    ,
    Line4,   DDDD \\
    Line5,   EEEE \\ [-2.75ex]
\end{filecontents*}

\newcommand{\PrintDTLTable}[1]{%
    % #1 = database to search
    \begin{tabular}{c c}\toprule
        Label & Cost  \\\cmidrule{1-2}
    \DTLforeach{#1}{%
        \RowID=RowID,%
        \Label=Label%
    }{%
        \DTLifnullorempty{\RowID}{%
            \\%[-\baselineskip]
            %\vspace*{-\baselineskip}%
            \cmidrule(lr){1-2}%
        }{%
            \RowID & \Label  
        }%
    }%
    \\\bottomrule
    \end{tabular}
}%

\begin{document}
\DTLloaddb[noheader,keys={RowID,Label}]{myDB}{foo.dat}

\PrintDTLTable{myDB}
\end{document}