如何消除列定义中的缩进？

Question

如果我是 Latex 的初学者，但写作是冒险家，那么这个问题可能看起来很奇怪。我试过了这不过。我已经定义了新的列样式，但我不知道如何删除每个表格单元格中的缩进。在这个简单的例子中，我如何消除“术语数”和表格左侧垂直线之间的间隙？

\documentclass{article}
\usepackage{amsmath}
\usepackage{geometry}
\usepackage{array}

\begin{document}
\parindent = 0pt
\the \parindent

\large{TEXT}

 \newcolumntype{R}[2]{
>{ \minipage[c][#1][c]{#2} }
l <
{\endminipage}
}

\begin{center}
    \begin{tabular} {|R{1cm}{.2\textwidth} R{1cm}{.2\textwidth} R{1cm}{.2\textwidth} R{1cm}{.2\textwidth}}

        Number of terms & $\sin(\dfrac{\pi}{6})$ & $\epsilon_t$ & $\epsilon_a$ \tabularnewline 
        1 &  0.52360 &  0.047198 &    \tabularnewline 
        2 & 0.49967 & 0.00065164 & 0.047880 \tabularnewline 
        3 & 0.50000 & 0.0000042652 & 0.00065590 \tabularnewline 
        4 & 0.50000 & 0.000000016261954 & 0.00000428144 \tabularnewline

    \end{tabular}
\end{center}

\end{document}

即使我已将其设置\parindent为零值。

Answer 1

添加@{}之间|和R

\documentclass{article}
\usepackage{amsmath}
\usepackage{geometry}
\usepackage{array}

\begin{document}
\parindent = 0pt
\the \parindent

\large{TEXT}

 \newcolumntype{R}[2]{>{\minipage[c][#1][c]{#2} }
l <
{\endminipage}
}

\begin{center}
    \begin{tabular} {|@{}R{1cm}{.2\textwidth} R{1cm}{.2\textwidth} R{1cm}{.2\textwidth} R{1cm}{.2\textwidth}}

        Number of terms & $\sin(\dfrac{\pi}{6})$ & $\epsilon_t$ & $\epsilon_a$ \tabularnewline 
        1 &  0.52360 &  0.047198 &    \tabularnewline 
        2 & 0.49967 & 0.00065164 & 0.047880 \tabularnewline 
        3 & 0.50000 & 0.0000042652 & 0.00065590 \tabularnewline 
        4 & 0.50000 & 0.000000016261954 & 0.00000428144 \tabularnewline

    \end{tabular}
\end{center}

\end{document}

您可以控制在垂直线和单元格内容之间插入多少空间：@{ }将插入一个空格，@{\hskip<width>}将插入一个特定的宽度，比如 5pt 或其他。

Answer 2

您的问题对我来说不是很清楚。从您的 MWE 中，我只看到表格设计中不必要的复杂性。所以看看以下解决方案是否可以帮助您：

\documentclass{article}
\usepackage{amsmath}
\usepackage[showframe]{geometry}% option showframe serve only to show page layout, 
                                % in real aplication had to be removed
\usepackage{array}

\parindent = 0pt

\begin{document}
\the\parindent

\large{TEXT}

{\renewcommand\tabcolsep{7.5mm}
    \begin{tabular} {|@{} l l l l @{}}
Number of terms & $\sin(\dfrac{\pi}{6})$ & $\epsilon_t$ & $\epsilon_a$ \tabularnewline
1 &  0.52360 &  0.047198 &    \tabularnewline
2 & 0.49967 & 0.00065164 & 0.047880 \tabularnewline
3 & 0.50000 & 0.0000042652 & 0.00065590 \tabularnewline
4 & 0.50000 & 0.000000016261954 & 0.00000428144 \tabularnewline
    \end{tabular}
}
%\end{center}
\end{document}

它给：