我试图将数据表分成两列，这样它们就不会占用太多页面。我的表格如下所示：
\documentclass[a4paper, 12pt]{article}
\usepackage{ifpdf}
\usepackage[latin1]{inputenc}
\usepackage[margin=1.5cm, left=1.5cm, top = 2cm, bottom=2cm]{geometry}
\usepackage{amsmath, mathtools}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage{epigraph}
\usepackage{wasysym}
\usepackage[none]{hyphenat}
\usepackage[super]{nth}
\usepackage{subfig}
\usepackage{textcomp}
\usepackage[usenames]{xcolor}
\usepackage{hyperref}
\usepackage{cite}
\usepackage{comment}
\usepackage{setspace}
\usepackage{float}
\usepackage{dcolumn}
\usepackage{caption}
\usepackage{multicol}
\usepackage{siunitx}
\usepackage{dcolumn,booktabs}
\newcolumntype{d}[1]{D{.}{.}{#1}}
\captionsetup{font={footnotesize, it},labelfont=footnotesize, width=.5\textwidth}
\newcommand\mc[1]{\multicolumn{1}{c}{#1}} % handy shortcut macro
\begin{document}
\begin{table}[h!]
\centering
\addtolength{\tabcolsep}{-0.3pt}
\sisetup{group-digits=integer}
\begin{tabular}{
@{}
l
S[table-format=+1.6]
S[table-format=5]
S[table-format=4.4]
@{}
}
\hline
Combo & {$|r|>0.5$} & {$n$} & {$r^2n > 1000$}\\
\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 \\
(K-U) & -0.535644 & 3730 & 1070.19 \\
(W2-R) & 0.535443 & 4022 & 1153.1 \\
(W2-I) & 0.574056 & 4020 & 1324.75 \\
\\
\hline
\end{tabular}
\caption[Mg\textsc{ii} colours OLS results against $log(z)$]{OLS results for photometric colours from the Mg\textsc{ii} dataset when plotted against $log(z)$.}
\label{table: mg sub}
\end{table}
\begin{table}
\centering
\addtolength{\tabcolsep}{-0.3pt}
\sisetup{group-digits=integer}
\begin{tabular}{
@{}
l
S[table-format=+1.6]
S[table-format=5]
S[table-format=4.4]
@{}
}
\hline
Combo & {$|r|>0.5$} & {$n$} & {$r^2n > 1000$}\\
\hline
(U+B) & 0.597204 & 11663 & 4159.64 \\
(U+V) & 0.553139 & 11640 & 3561.4 \\
(U+R) & 0.542890 & 11632 & 3428.29 \\
(U+I) & 0.538584 & 11626 & 3372.38 \\
(U+J) & 0.534619 & 3709 & 1060.1 \\
(U+K) & 0.524521 & 3730 & 1026.21 \\
(U+W1) & 0.568288 & 3946 & 1274.36 \\
(U+W2) & 0.590900 & 3974 & 1387.57 \\
(U+W3) & 0.610303 & 3588 & 1336.42 \\
(U+W4) & 0.531177 & 4088 & 1153.43 \\
(B+U) & 0.597204 & 11663 & 4159.64 \\
(B+V) & 0.503560 & 11884 & 3013.46 \\
(B+W1) & 0.523232 & 4001 & 1095.36 \\
(B+W2) & 0.556555 & 4029 & 1248 \\
(B+W3) & 0.574910 & 3628 & 1199.13 \\
(V+U) & 0.553139 & 11640 & 3561.4 \\
(V+B) & 0.503560 & 11884 & 3013.46 \\
(R+U) & 0.542890 & 11632 & 3428.29 \\
(I+U) & 0.538584 & 11626 & 3372.38 \\
(J+U) & 0.534619 & 3709 & 1060.1 \\
(K+U) & 0.524521 & 3730 & 1026.21 \\
(W1+U) & 0.568288 & 3946 & 1274.36 \\
(W1+B) & 0.523232 & 4001 & 1095.36 \\
(W2+U) & 0.590900 & 3974 & 1387.57 \\
(W2+B) & 0.556555 & 4029 & 1248 \\
(W2+W3) & 0.500704 & 5436 & 1362.83 \\
(W3+U) & 0.610303 & 3588 & 1336.42 \\
(W3+B) & 0.574910 & 3628 & 1199.13 \\
(W3+W2) & 0.500704 & 5436 & 1362.83 \\
(W4+U) & 0.531177 & 4088 & 1153.43 \\
\\
\hline
\end{tabular}
\caption[Mg\textsc{ii} additive combinations OLS results against $log(z)$]{OLS results for additive combinations from the Mg\textsc{ii} dataset when plotted against $log(z)$.}
\label{table: mg add}
\end{table}
\end{document}
当我将表格显示在一列中时，它们看起来很好，但如果我将它们包装在
\begin{multicols}{2}
%my table code here
\end{multicols}
我的表格消失了。我做错了什么？
答案1
这记录multicol明确指出，不允许 table这样做，否则它们将会消失。figure
相反，你可以使用center并排版标题
\captionof{table}[short caption]{long caption}
\documentclass[a4paper, 12pt]{article}
\usepackage{ifpdf}
\usepackage[latin1]{inputenc}
\usepackage[margin=1.5cm, left=1.5cm, top = 2cm, bottom=2cm]{geometry}
\usepackage{amsmath, mathtools}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage{epigraph}
\usepackage{wasysym}
\usepackage[none]{hyphenat}
\usepackage[super]{nth}
\usepackage{subfig}
\usepackage{textcomp}
\usepackage[usenames]{xcolor}
\usepackage{hyperref}
\usepackage{cite}
\usepackage{comment}
\usepackage{setspace}
\usepackage{float}
\usepackage{dcolumn}
\usepackage{caption}
\usepackage{multicol}
\usepackage{siunitx}
\usepackage{dcolumn,booktabs}
\newcolumntype{d}[1]{D{.}{.}{#1}}
\captionsetup{font={footnotesize, it},labelfont=footnotesize, width=.5\textwidth}
\newcommand\mc[1]{\multicolumn{1}{c}{#1}} % handy shortcut macro
\begin{document}
\begin{multicols}{2}
\begin{center}
\addtolength{\tabcolsep}{-0.3pt}
\sisetup{group-digits=integer}
\begin{tabular}{
@{}
l
S[table-format=+1.6]
S[table-format=5]
S[table-format=4.4]
@{}
}
\hline
Combo & {$|r|>0.5$} & {$n$} & {$r^2n > 1000$}\\
\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 \\
(K-U) & -0.535644 & 3730 & 1070.19 \\
(W2-R) & 0.535443 & 4022 & 1153.1 \\
(W2-I) & 0.574056 & 4020 & 1324.75 \\
\\
\hline
\end{tabular}
\captionof{table}[Mg\textsc{ii} colours OLS results against $log(z)$]{OLS results for photometric colours from the Mg\textsc{ii} dataset when plotted against $log(z)$.}
\label{table: mg sub}
\end{center}
\begin{center}
\addtolength{\tabcolsep}{-0.3pt}
\sisetup{group-digits=integer}
\begin{tabular}{
@{}
l
S[table-format=+1.6]
S[table-format=5]
S[table-format=4.4]
@{}
}
\hline
Combo & {$|r|>0.5$} & {$n$} & {$r^2n > 1000$}\\
\hline
(U+B) & 0.597204 & 11663 & 4159.64 \\
(U+V) & 0.553139 & 11640 & 3561.4 \\
(U+R) & 0.542890 & 11632 & 3428.29 \\
(U+I) & 0.538584 & 11626 & 3372.38 \\
(U+J) & 0.534619 & 3709 & 1060.1 \\
(U+K) & 0.524521 & 3730 & 1026.21 \\
(U+W1) & 0.568288 & 3946 & 1274.36 \\
(U+W2) & 0.590900 & 3974 & 1387.57 \\
(U+W3) & 0.610303 & 3588 & 1336.42 \\
(U+W4) & 0.531177 & 4088 & 1153.43 \\
(B+U) & 0.597204 & 11663 & 4159.64 \\
(B+V) & 0.503560 & 11884 & 3013.46 \\
(B+W1) & 0.523232 & 4001 & 1095.36 \\
(B+W2) & 0.556555 & 4029 & 1248 \\
(B+W3) & 0.574910 & 3628 & 1199.13 \\
(V+U) & 0.553139 & 11640 & 3561.4 \\
(V+B) & 0.503560 & 11884 & 3013.46 \\
(R+U) & 0.542890 & 11632 & 3428.29 \\
(I+U) & 0.538584 & 11626 & 3372.38 \\
(J+U) & 0.534619 & 3709 & 1060.1 \\
(K+U) & 0.524521 & 3730 & 1026.21 \\
(W1+U) & 0.568288 & 3946 & 1274.36 \\
(W1+B) & 0.523232 & 4001 & 1095.36 \\
(W2+U) & 0.590900 & 3974 & 1387.57 \\
(W2+B) & 0.556555 & 4029 & 1248 \\
(W2+W3) & 0.500704 & 5436 & 1362.83 \\
(W3+U) & 0.610303 & 3588 & 1336.42 \\
(W3+B) & 0.574910 & 3628 & 1199.13 \\
(W3+W2) & 0.500704 & 5436 & 1362.83 \\
(W4+U) & 0.531177 & 4088 & 1153.43 \\
\\
\hline
\end{tabular}
\captionof{table}[Mg\textsc{ii} additive combinations OLS results against $log(z)$]{OLS results for additive combinations from the Mg\textsc{ii} dataset when plotted against $log(z)$.}
\label{table: mg add}
\end{center}
\end{multicols}
\end{document}