I have a table below and I would like to insert a figure to its right. Both table and figure will use a single caption. Below is my code for the table.
\begin{table*}
\begin{center}
\begin{tabular}{|l|l|cc|cc|cc|}
\hline%\noalign{\smallskip}
\multirow{2}{*}{Type} & \multirow{2}{*}{Model} & \multicolumn{2}{c|}{$\text{x}_{1:10} \rightarrow \hat{\text{x}}_{11:30}$} & \multicolumn{2}{c|}{$\text{x}_{1:10} \rightarrow \hat{\text{x}}_{11:50}$} & \multicolumn{2}{c|}{$\text{x}_{1:10} \rightarrow \hat{\text{x}}_{11:70}$} \\
& & SSIM & PSNR & SSIM & PSNR & SSIM & PSNR \\
\hline
\multirow{3}{*}{Deterministic} \ & 2D ConvLSTM \cite{convlstm} & 0.712 & 23.58 & 0.639 & 22.85 & 0.551 & 20.13 \\
& PredRNN++ \cite{wang-predrnn} & 0.865 & 28.47 & 0.741 & 25.21 & 0.702 & 23.51 \\
& E3D-LSTM \cite{wang-e3d} & \textbf{0.879} & \textbf{29.31} & 0.810 & 27.24 & 0.798 & 26.82 \\
\hline
\multirow{2}{*}{Stochastic} & Variational 2D ConvLSTM \cite{vrnn} & 0.787 & 25.76 & 0.733 & 24.83 & 0.672 & 23.13 \\
& Variational 3D ConvLSTM (Ours) & 0.866 & 28.31 & \textbf{0.852} & \textbf{27.89} & \textbf{0.846} & \textbf{27.66} \\
\hline
\end{tabular}
\end{center}
\caption{Results on the KTH action dataset when using 10 frames to predict 20 ($\text{x}_{1:10} \rightarrow \hat{\text{x}}_{11:30}$), 40 ($\text{x}_{1:10} \rightarrow \hat{\text{x}}_{11:50}$), and 60 ($\text{x}_{1:10} \rightarrow \hat{\text{x}}_{11:70}$) timesteps into the future. The metrics are computed frame-wise. Higher SSIM and PSNR scores indicate better results.}
\label{table:quantitativekth}
\end{table*}
I tried following the code here Include table as a subfigure but the figure always appears below.
\begin{table*}
\begin{center}
\subfloat[][]{\begin{tabular}{|l|l|cc|cc|cc|}
\hline%\noalign{\smallskip}
\multirow{2}{*}{Type} & \multirow{2}{*}{Model} & \multicolumn{2}{c|}{$\text{x}_{1:10} \rightarrow \hat{\text{x}}_{11:30}$} & \multicolumn{2}{c|}{$\text{x}_{1:10} \rightarrow \hat{\text{x}}_{11:50}$} & \multicolumn{2}{c|}{$\text{x}_{1:10} \rightarrow \hat{\text{x}}_{11:70}$} \\
& & SSIM & PSNR & SSIM & PSNR & SSIM & PSNR \\
\hline
\multirow{3}{*}{Deterministic} \ & 2D ConvLSTM \cite{convlstm} & 0.712 & 23.58 & 0.639 & 22.85 & 0.551 & 20.13 \\
& PredRNN++ \cite{wang-predrnn} & 0.865 & 28.47 & 0.741 & 25.21 & 0.702 & 23.51 \\
& E3D-LSTM \cite{wang-e3d} & \textbf{0.879} & \textbf{29.31} & 0.810 & 27.24 & 0.798 & 26.82 \\
\hline
\multirow{2}{*}{Stochastic} & Variational 2D ConvLSTM \cite{vrnn} & 0.787 & 25.76 & 0.733 & 24.83 & 0.672 & 23.13 \\
& Variational 3D ConvLSTM (Ours) & 0.866 & 28.31 & \textbf{0.852} & \textbf{27.89} & \textbf{0.846} & \textbf{27.66} \\
\hline
\end{tabular}
}
\quad
\subfloat[][]{\includegraphics[width=0.1\textwidth]{kth.png}}
\end{center}
\caption{Results on the KTH action dataset when using 10 frames to predict 20 ($\text{x}_{1:10} \rightarrow \hat{\text{x}}_{11:30}$), 40 ($\text{x}_{1:10} \rightarrow \hat{\text{x}}_{11:50}$), and 60 ($\text{x}_{1:10} \rightarrow \hat{\text{x}}_{11:70}$) timesteps into the future. The metrics are computed frame-wise. Higher SSIM and PSNR scores indicate better results.}
\label{table:quantitativekth}
\end{table*}




[][]in your second screenshot makes me guess that you got an error message such as " Undefined control sequence. \subfloat" because you forgot to add thesubfigpackage to your preamble.) Apart from that, your table and image are probably wider than the textwidth, hence they are placed below each other instead of side-by-side. This guess is however hard to confirm without a full MWE. – leandriis Sep 19 '20 at 12:54