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如何自定义对齐表格中的单元格？

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如何自定义对齐表格中的单元格？

我想从文件中读取一个表格，其中每个单元格包含两个由 $\pm$ 运算符分隔的数字。我希望单元格在 $\pm$ 运算符处对齐。我当前的代码可以成功读取表格，但 $\pm$ 未对齐。

\documentclass{standalone}

\usepackage{pgfplotstable, booktabs}
\usepackage{filecontents}

\begin{document}

\begin{filecontents}{mydata}
    Types,First Col,Second Col,Third Col
    TypeA,-0.1575 $\pm$ 0.0118,-0.2428 $\pm$ 0.0074,-0.1457 $\pm$ 0.0078
    TypeB, 0.0074 $\pm$ 0.0308,-0.276  $\pm$ 0.0251,-0.0181 $\pm$ 0.00173
\end{filecontents}

\pgfplotstabletypeset[
    col sep=comma,
    column type=l,
    string type,
    every head row/.style={
        after row={
            \midrule
        },
     },
     every last row/.style={after row=\bottomrule},
     display columns/0/.style={column type = {l|}},
     display columns/1/.style={column type = {c|}},
     display columns/2/.style={column type = {c|}},
     display columns/3/.style={column type = {c}},
]{mydata}

\end{document}

任何帮助，将不胜感激。

答案1

嗯，那真是痛苦！

\documentclass{standalone}

\usepackage{pgfplotstable, booktabs}
\usepackage{filecontents}

\usepackage{siunitx}
\sisetup{separate-uncertainty,
  uncertainty-separator={\pm},
  table-figures-uncertainty=1,
  table-number-alignment=center,
  table-figures-decimal=5,% reserve space for 5 decimal places
  output-open-uncertainty={},% prevents surrounding uncertainty with (...)
  output-close-uncertainty={}}

\begin{document}

\begin{filecontents}{mydata}
    Types,First Col,Second Col,Third Col
    TypeA,-0.1575 $\pm$ 0.0118,-0.2428 $\pm$ 0.0074,-0.1457 $\pm$ 0.0078
    TypeB, 0.0074 $\pm$ 0.0308,-0.276  $\pm$ 0.0251,-0.0181 $\pm$ 0.00173
\end{filecontents}

\pgfplotstabletypeset[
    col sep=comma,
    ignore chars={\$},% siunitx does not like $\pm$, but \pm is fine
    string type,
    %multicolumn names={l|},% do not apply S format to header
    display columns/0/.style={column type = {l|}},
    display columns/1/.style={column type = {S|},column name={\multicolumn{1}{l|}{First Col}}},
    display columns/2/.style={column type = {S|},column name={\multicolumn{1}{l|}{Second Col}}},
    display columns/3/.style={column type = {S},column name={\multicolumn{1}{l}{Third Col}}},
    every head row/.style={
        before row={\toprule},
        after row={\midrule},
     },
     every last row/.style={after row=\bottomrule},
]{mydata}

\end{document}

演示

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