table over two columns in twocolumn mode

Question

Here's my code:

\documentclass[fleqn,10pt]{SelfArx}
\setlength{\columnsep}{0.55cm}
\setlength{\fboxrule}{0.75pt}
\definecolor{color1}{RGB}{0,0,90}
\definecolor{color2}{RGB}{0,20,20}

\begin{document}

\begin{table}[h]
\caption*{Results}
\begin{tabular}{ p{5cm} p{3cm} p{2cm} p{3cm} }  
\hline \\ [-0.3cm]
\textsc{Model} \\

parameters & Value $\pm$ $\theta$ &  p-values & range   \\ [0.5ex]
\hline 
\textbf{A} \\
\hspace{1cm} x & -0.1 $\pm$ 0.216  & 0.0000 & (-1.000, -0.560)  \\ 
\hspace{1cm} y & -2.1 $\pm$ 0.279  & 0.0000 & (-2.600, -1.500) \\ 
\hspace{1cm} z ($s^{-1}$)  & \hspace{0.15cm}0.1 $\pm$ 0.200 & 0.0001 & (0.400, 1.200) \\ 
\hspace{1cm} t1  & 1002  \\ 
\hline
\textbf{B} \\
\textbf{para1} \\
\hspace{1cm} b1 &  0.229 $\pm$ 1.104 & 0.800 & (-2.300, 1.900)  \\ 
\hspace{1cm} b2 & -0.753 $\pm$ 1.850  & 0.777  & (-4.100, 2.900)  \\ 
\hspace{1cm} b3 & -0.876 $\pm$ 1.863  & 0.5999  & (-4.000, 3.100) \\
\hspace{1cm} b4   & -0.6324 $\pm$ 1.176 & 0.5227  & (-3.200, 1.300) \\ 
\hspace{1cm} b5   & -0.123 $\pm$ 1.516 & 0.7882 & (-3.200, 2.600) \\ 
\hspace{1cm} b6  & -5.500 $\pm$ 1.522 & 0.0029 & (-7.800, -1.900) \\ 
\hspace{1cm} b7   & -0.600$\pm$ 1.120 & 0.6198 & (-2.700, 1.600)  \\ 

\textbf{para2} \\
\hspace{1cm} $a1 $  &   -1.00  $\pm$ 0.462 & 0.0356 &(-1.900, -0.100) \\ 
\hspace{1cm} a2   & -0.210 $\pm$ 0.092 & 0.0071 & (-0.400, -0.100) \\ 
\hspace{1cm} a3   &  \hspace{0.05cm} 1.10 $\pm$ 0.500 & 0.0099 & (0.600, 2.600) \\ 
\hspace{1cm}  a4    & -0.10 $\pm$ 0.059 & 0.0124 & (-0.200, -0.010) \\ 
\hspace{1cm} t2  &  20000      \\

\hline
\end{tabular}
\caption{Table 1 } 
\label{tab_1}
\end{table}

\end{document}

Apologies for the rather lengthy code-it is needed to illustrate the current problem. The above code was taken from a latex template. My problem is that the table inserted on the second page is too large for the page. This is due to the fact that the page is divided into two columns. I was just wondering if there was a way for me to make the table extend across the two columns without overlapping with the text. I'm guessing this documentclass automatically divides pages into two because I cant find any code that's responsible for this in the above. I know I could use \begin{table}[p] to move the table into a separate page but ideally I would like the table to be within the document rather than beyond bibliography.

Answer 1

You can use

\begin{table*}
    ...
\end{table*}

to let a table span two columns.

And to be honest, not much of your code is "needed to illustrate the current problem". For example, it has nothing to do with the SelfArx class you're using (and I first had to look for), and most of the other code you posted.

Here's a much more minimal version of your code

\documentclass[twocolumn]{article}

\usepackage{lipsum}
\usepackage{booktabs}
\usepackage{siunitx}

\title{Title}
\author{John Smith}

\begin{document}

\maketitle

\section{Section}
\lipsum[1-4]

\begin{table*}
    \centering
    \caption{Table caption}
    \begin{tabular}{csss}  
        \toprule
        \textsc{Model} \\
        Parameters & Value $\pm$ $\theta$ &  p-values & range\\
        \midrule
        \textbf{A} \\
        x & -0.1 $\pm$ 0.216  & 0.0000 & (-1.000, -0.560)  \\ 
        ...\\
        \midrule
        \textbf{B} \\
        \textbf{para1} \\
        b1 &  0.229 $\pm$ 1.104 & 0.800 & (-2.300, 1.900)  \\ 
        \ldots\\
        \bottomrule
        \end{tabular}
\end{table*}

\lipsum[5-9]

\end{document}