我正在尝试生成 3 个回归输出面板，如下所示https://medium.com/@linglp/nice-regression-tables-in-stata-17d3895befd2在 stata 中运行回归分析后。我完全按照上面的链接所示执行代码。然而，在编译时我得到了错误
! LaTeX Error: There's no line here to end.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.83 \begin{table}[htbp]\centering \\
\def\sym#1{\ifmode^{#1}\else\(^{#1}\)\...
?
以下是 MWE：
\documentclass[12pt]{report}
\usepackage{titling}
\usepackage[utf8]{inputenc}
\usepackage{setspace} \doublespacing
\usepackage{caption}
\usepackage[margin=1in]{geometry}
\usepackage{booktabs,makecell,longtable}
\begin{document}
\begin{table}[htbp]\centering \\ \def\sym#1{\ifmode^{#1}\else\(^{#1}\)\fi} \\ \caption{title} \\ \begin{tabular}{l*{3}{c}} \hline\hline
&\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}\\
&\multicolumn{1}{c}{y1}&\multicolumn{1}{c}{y2}&\multicolumn{1}{c}{y3}\\
\hline \\ \multicolumn{3}{c}{\textbf{Panel A}} \\\\[-1ex]
1.treatment& 0.122\sym{***}& -0.216\sym{***}& 1.406\sym{***}\\
& (0.006) & (0.007) & (0.046) \\
[1em]
1.after& -0.005 & 0.033\sym{**} & 0.406\sym{***}\\
& (0.009) & (0.012) & (0.063) \\
[1em]
1.treatment\#1.after& 0.055\sym{***}& -0.085\sym{***}& -0.549\sym{***}\\
& (0.008) & (0.008) & (0.057) \\
[1em]
\_cons & 0.105\sym{***}& 0.492\sym{***}& 5.769\sym{***}\\
& (0.008) & (0.010) & (0.061) \\
\hline
R-squared & 0.198 & 0.108 & 0.095 \\
No. of observations& 1.4e+05 & 1.4e+05 & 6.8e+04 \\
fixed effect1& Yes & Yes & Yes \\
fixed effect2& Yes & Yes & Yes \\
Control variables& Yes & Yes & Yes \\
\hline \\ \multicolumn{3}{c}{\textbf{Panel B}} \\\\[-1ex]
1.treatment2& 0.170\sym{***}& -0.103\sym{***}& 1.064\sym{***}\\
& (0.021) & (0.021) & (0.113) \\
[1em]
1.after& 0.012 & 0.056\sym{*} & 0.305\sym{*} \\
& (0.017) & (0.023) & (0.150) \\
[1em]
1.treatment2\#1.after& 0.074\sym{***}& -0.123\sym{***}& -0.253\sym{**} \\
& (0.012) & (0.013) & (0.091) \\
[1em]
\_cons & 0.034\sym{*} & 0.316\sym{***}& 6.599\sym{***}\\
& (0.017) & (0.022) & (0.143) \\
\hline
R-squared & 0.212 & 0.128 & 0.128 \\
No. of observations& 2.5e+04 & 2.5e+04 & 1.3e+04 \\
fixed effect1& Yes & Yes & Yes \\
fixed effect2& Yes & Yes & Yes \\
Control variables& Yes & Yes & Yes \\
\hline \\ \multicolumn{3}{c}{\textbf{Panel C}} \\\\[-1ex]
1.treatment3& 0.170\sym{***}& -0.103\sym{***}& 1.064\sym{***}\\
& (0.021) & (0.021) & (0.113) \\
[1em]
1.after& 0.012 & 0.056\sym{*} & 0.305\sym{*} \\
& (0.017) & (0.023) & (0.150) \\
[1em]
1.treatment3\#1.after& 0.074\sym{***}& -0.123\sym{***}& -0.253\sym{**} \\
& (0.012) & (0.013) & (0.091) \\
[1em]
\_cons & 0.034\sym{*} & 0.316\sym{***}& 6.599\sym{***}\\
& (0.017) & (0.022) & (0.143) \\
\hline
R-squared & 0.212 & 0.128 & 0.128 \\
No. of observations& 2.5e+04 & 2.5e+04 & 1.3e+04 \\
fixed effect1& Yes & Yes & Yes \\
fixed effect2& Yes & Yes & Yes \\
Control variables& Yes & Yes & Yes \\
\hline\hline \multicolumn{6}{l}{\footnotesize Standard errors in parentheses}\\\multicolumn{2}{l}{footnotesize \sym{*} \(p<0.05\), \sym{**} \(p<0.01\), \sym{***}\(p<0.001\)}\\ \end{tabular}\\ \end{table}
\end{document}
如能得到任何帮助我将非常感激，谢谢！