What is the best practice when it comes to tables that semi-correlate context-wise? I've got the problem, that currently the tables take a large space from my work, but are also required. What would be the best practice method to still make them readable but also reduce space?
\begin{table}[!htb]
\centering
\caption{Accuracy of the different constellations}
\label{tab:nn_acc_const}
\begin{tabular}{rlllll}
\toprule
\multicolumn{1}{l}{} & Size & Const1 & Const2 & Const3 & Const4 \\ \midrule \multirow{4}{*}{\begin{tabular}[c]{@{}r@{}}Accuracy\\ Training\end{tabular}} & \SI{25}{\%} & 27.67 & 26.22 & 26.29 & 26.11 \\ & \SI{50}{\%} & 26.5 & 23.78 & 24.31 & 24.34 \\ & \SI{75}{\%} & 25.37 & 25.83 & 24.33 & 23.74 \\ & \SI{100}{\%} & 25.83 & 24.65 & 22.59 & 23.31 \\ \midrule
\multirow{4}{*}{\begin{tabular}[c]{@{}r@{}}Accuracy\\ Validation\end{tabular}} & \SI{25}{\%} & 18.2 & 18.84 & 18.27 & 21 \\ & \SI{50}{\%} & 17.86 & 22.32 & 18.34 & 19.27 \\ & \SI{75}{\%} & 20.07 & 20.99 & 18.8 & 20.96 \\ & \SI{100}{\%} & 21.06 & 21.22 & 18.2 & 19.56 \\ \bottomrule
\end{tabular}
\end{table}
\begin{table}[]
\centering
\caption{Loss of the different constellations}
\label{tab:nn_loss_const}
\begin{tabular}{rlllll}
\toprule
\multicolumn{1}{l}{} & Size & Const1 & Const2 & Const3 & Const4 \\ \midrule
\multirow{4}{*}{\begin{tabular}[c]{@{}r@{}}Loss\\ Training\end{tabular}} & \SI{25}{\%} & 0.047 & 0.034 & 0.039 & 0.029 \\ & \SI{50}{\%} & 0.036 & 0.26 & 0.029 & 0.023 \\ & \SI{75}{\%} & 0.030 & 0.21 & 0.025 & 0.019 \\ & \SI{100}{\%} & 0.025 & 0.018 & 0.021 & 0.16 \\ \midrule
\multirow{4}{*}{\begin{tabular}[c]{@{}r@{}}Loss\\ Validation\end{tabular}} & \SI{25}{\%} & 0.2 & 0.14 & 0.17 & 0.12 \\ & \SI{50}{\%} & 0.15 & 0.1 & 0.12 & 0.09 \\ & \SI{75}{\%} & 0.12 & 0.088 & 0.1 & 0.077 \\ & \SI{100}{\%} & 0.1 & 0.075 & 0.086 & 0.066 \\ \bottomrule
\end{tabular}
\end{table}
\begin{table}[]
\centering
\caption{Overview of \gls{EMG} and \gls{IMU} Accuracy per arm position}
\label{tab:nn_acc_pos}
\begin{adjustbox}{max width=\textwidth}
\begin{tabular}{@{}lllllll@{}}
\toprule
\textit{} & IMU$_{train}$ & IMU$_{val}$ & EMG$_{train}$ & EMG$_{val}$ & Combined$_{train}$ & Combined$_{val}$ \\ \midrule
lower & 23.83 & 18.75 & x & x & 23.83 & 18.75 \\
middle & 26.33 & 20.19 & 28.46 & 16.85 & 22.89 & 18.99 \\
upper & 23.91 & 20.68 & 25.36 & 16.57 & 20.59 & 18.66 \\ \bottomrule
\end{tabular}
\end{adjustbox}
\end{table}
\begin{table}[]
\centering
\caption{Overview of \gls{EMG} and \gls{IMU} Loss per arm position}
\label{tab:nn_loss_pos}
\begin{adjustbox}{max width=\textwidth}
\begin{tabular}{@{}lllllll@{}}
\toprule
\textit{} & IMU$_{train}$ & IMU$_{val}$ & EMG$_{train}$ & EMG$_{val}$ & Combined$_{train}$ & Combined$_{val}$ \\ \midrule
lower & 0.025 & 0.105 & x & x & 0.025 & 0.105 \\
middle & 0.024 & 0.1 & 0.026 & 0.12 & 0.018 & 0.077 \\
upper & 0.018 & 0.07 & 0.019 & 0.08 & 0.013 & 0.054 \\ \bottomrule
\end{tabular}
\end{adjustbox}
\end{table}
and
\begin{table}[]
\centering
\caption{Accuracy of size and speed limitations}
\label{tab:nn_acc_limits}
\begin{adjustbox}{max width=\textwidth}
\begin{tabular}{@{}lllllll@{}}
\toprule
\textit{} & slow$_{train}$ & slow$_{val}$ & fast$_{train}$ & fast$_{val}$ & combined$_{train}$ & combined$_{val}$ \\ \midrule
5cm & 23.05 & 18.1 & 23.98 & 18.69 & 22.18 & 18.27 \\
10cm & 24.34 & 21.49 & 24.37 & 20.39 & 22.24 & 20.94 \\
combined & 21.59 & 18.56 & 21.72 & 18.29 & 20.63 & 18.94 \\ \bottomrule
\end{tabular}
\end{adjustbox}
\end{table}
\begin{table}[]
\centering
\caption{Loss of size and speed limitations}
\label{tab:nn_loss_limits}
\begin{adjustbox}{max width=\textwidth}
\begin{tabular}{@{}lllllll@{}}
\toprule
\textit{} & slow$_{train}$ & slow$_{val}$ & fast$_{train}$ & fast$_{val}$ & combined$_{train}$ & combined$_{val}$ \\ \midrule
5cm & 0.02 & 0.083 & 0.02 & 0.084 & 0.014 & 0.058 \\
10cm & 0.019 & 0.08 & 0.02 & 0.083 & 0.014 & 0.057 \\
combined & 0.014 & 0.057 & 0.014 & 0.058 & 0.01 & 0.041 \\ \bottomrule
\end{tabular}
\end{adjustbox}
\end{table}
\begin{table}[]
\centering
\caption{Accuracy of the standard settings and the tuned settings for the \gls{RFC}}
\label{tab:compar_acc}
\begin{tabular}{@{}lll@{}}
\toprule
\textit{} & Standard settings & Tuned settings \\ \midrule
combined & 0.161 & 0.167 \\
IMU & 0.18 & 0.185 \\
EMG & 0.139 & 0.139 \\ \bottomrule
\end{tabular}
\end{table}
\begin{table}[]
\centering
\caption{NeuroKit pipeline Accuracy comparison using \gls{RFC}}
\label{tab:compar_nk_acc_rfc}
\begin{tabular}{@{}llll@{}}
\toprule
\textit{} & \begin{tabular}[c]{@{}l@{}}Standard settings \\ normal pipeline\end{tabular} & \begin{tabular}[c]{@{}l@{}}Standard settings \\ NK pipeline\end{tabular} & \begin{tabular}[c]{@{}l@{}}Tuned settings \\ NK pipeline\end{tabular} \\ \midrule
combined & 0.161 & 0.204 & 0.197 \\
IMU & 0.18 & 0.252 & 0.255 \\
EMG & 0.139 & 0.115 & 0.111 \\ \bottomrule
\end{tabular}
\end{table}
\begin{table}[]
\centering
\caption{NeuroKit pipeline Accuracy comparison using \gls{NN}}
\label{tab:compar_nk_acc_nn}
\begin{tabular}{@{}lllll@{}}
\toprule
\textbf{} & Standard$_{train}$ & Standard$_{test}$ & NK pipeline$_{train}$ & NK pipeline$_{test}$ \\ \midrule
combined & 20.63 & 18.94 & 23.68 & 21.82 \\
IMU & 22.92 & 20.28 & 29.75 & 26.86 \\
EMG & 22 & 17 & 17.32 & 15.89 \\ \bottomrule
\end{tabular}
\end{table}
\begin{table}[]means "don't allow thetable anywhere" latex actually checks for that and issues the warningLaTeX Warning: No positions in optional float specifier.\begin{adjustbox}{max width=\textwidth}should usually be avoided, it leads to inconsistent font sizesslow$_{\mathrm{val}}$and similarly for all your others, never use math italic for words, it separates the letters to look like a product of 1-letter variables