Caption and label of a table, of two tables kept side by side, is assigned to another table

Question

I have created two table side by side with minipage. the tables appear perfectly except the label and caption for the right table show up as that of left table. On the other hand, the caption and label for right table vanish.

Here's the code:

\documentclass[12pt,a4paper,landscape]{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage[left=2cm,right=2cm,top=2cm,bottom=2cm]{geometry}
\usepackage[paper=portrait,pagesize]{typearea}
\usepackage{mathtools}% http://ctan.org/pkg/mathtools
\usepackage{amsmath}
\usepackage{booktabs}
\usepackage{float}
\restylefloat{table}


\begin{document}    
\begin{table}[H]
\setlength\tabcolsep{0pt}
\begin{minipage}{0.475\textwidth}
\begin{tabular*}{1\textwidth}{@{\extracolsep{\fill}} l *{8}{c}}
\toprule
Original Class & \multicolumn{8}{c}{Class Predicted} \\
\cmidrule{2-9}
& 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8  \\
\midrule
1 & 17 & 0 & 0 & 0 & 0  & 0  & 0 & 0 \\
2 & 0 & 14 & 0 & 0 & 0 & 0 & 0 & 0 \\
3 & 0 & 0 & 17 & 0 & 0 & 0 & 0 & 0 \\
4 & 0 & 0 & 0 & 17 & 0 & 0 & 0 & 0  \\
5 & 0 & 0 & 0 & 0 & 15 & 0 & 0 & 0  \\
6 & 0 & 0 & 0 & 0 & 1 & 11 & 0 & 0  \\
7 & 0 & 0 & 0 & 0 & 0 & 0 & 13 & 0  \\
8 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 15  \\
\bottomrule
\end{tabular*}
\caption{Confusion Matrix}
\label{tab:Table 1}
\end{minipage}
\hfill
\begin{minipage}{0.475\textwidth}
\begin{tabular*}{1\textwidth}{@{\extracolsep{\fill}} l *{8}{c}}
\toprule
& \multicolumn{8}{c}{Class} \\
\cmidrule{2-9}
& 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8  \\
\midrule
TPR & 1 & 1 & 1 & 1 & 1  & 0.917  & 1 & 1 \\
TNR & 1 & 1 & 1 & 1 & 0.99 & 1 & 1 & 1 \\
FPR & 0 & 0 & 0 & 0 & 0.0095 & 0 & 0 & 0 \\
FNR & 0 & 0 & 0 & 0 & 0 & 0.083 & 0 & 0  \\
\bottomrule
\end{tabular*}
\caption{Evaluation Metrics}
\label{tab:Table 2}
\end{minipage}
\end{table}
\end{document}

Output:

Edit

I used the answer written by Mico here.

Edit 2

I have used [ht!] for one table and the table was misplaced (Output attached). So I'm still using [H] which gives me desired output.

Answer 1

As you've found out in the meantime, running \restylefloat is the cause of the odd-ball formatting issue you've encountered. Incidentally, it is not true that it's necessary to run \restylefloat in order to use the [H] positioning specifier with table or figure floats. That said, you should really ask yourself if you're doing the right thing -- typographically speaking -- by using [H] at all, as its use can have some unexpected negative side-effects. Everything good about [H] can also be achieved with [ht!]. For a longer discussion of this issue, see 'h' float specifier changed to 'ht' warning when not attempting to specify a float.

As you've probably also noticed by now, if two minipage environments of unequal heights are placed side by side, their default vertical orientation is to align them verically in the middle. If this is not desired and, say, if you prefer top-alignment, just specify [t] ("top") for both minipage as well as for both tabular* environments.

\documentclass[12pt,a4paper,%landscape % <-- landscape option is overridden
     ]{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
%%%\usepackage{amsmath}  % is loaded automatically by 'mathtools'
%%%\usepackage{amsfonts} % is loaded automatically by 'amssymb'
\usepackage{amssymb}
\usepackage[margin=2cm]{geometry}
\usepackage[paper=portrait,pagesize]{typearea}
\usepackage{mathtools}
%%%\usepackage{amsmath} % don't load packages twice
\usepackage{booktabs}
%%%\usepackage{float}   % you don't really need this package
%%%\restylefloat{table} % don't do this


\begin{document}    
\begin{table}[ht!]  % much safer than "[H]"
\setlength\tabcolsep{0pt}
\begin{minipage}[t]{0.475\textwidth}
\begin{tabular*}{1\textwidth}[t]{@{\extracolsep{\fill}} l *{8}{c}}
\toprule
Orig.\ Class & \multicolumn{8}{c}{Class Predicted} \\
\cmidrule{2-9}
& 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8  \\
\midrule
1 & 17 & 0 & 0 & 0 & 0  & 0  & 0 & 0 \\
2 & 0 & 14 & 0 & 0 & 0 & 0 & 0 & 0 \\
3 & 0 & 0 & 17 & 0 & 0 & 0 & 0 & 0 \\
4 & 0 & 0 & 0 & 17 & 0 & 0 & 0 & 0  \\
5 & 0 & 0 & 0 & 0 & 15 & 0 & 0 & 0  \\
6 & 0 & 0 & 0 & 0 & 1 & 11 & 0 & 0  \\
7 & 0 & 0 & 0 & 0 & 0 & 0 & 13 & 0  \\
8 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 15  \\
\bottomrule
\end{tabular*}
\caption{Confusion Matrix}
\label{tab:Table1}
\end{minipage}
\hfill
\begin{minipage}[t]{0.475\textwidth}
\begin{tabular*}{1\textwidth}[t]{@{\extracolsep{\fill}} l *{8}{c}}
\toprule
& \multicolumn{8}{c}{Class} \\
\cmidrule{2-9}
& 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8  \\
\midrule
TPR & 1 & 1 & 1 & 1 & 1  & 0.917  & 1 & 1 \\
TNR & 1 & 1 & 1 & 1 & 0.99 & 1 & 1 & 1 \\
FPR & 0 & 0 & 0 & 0 & 0.0095 & 0 & 0 & 0 \\
FNR & 0 & 0 & 0 & 0 & 0 & 0.083 & 0 & 0  \\
\bottomrule
\end{tabular*}
\caption{Evaluation Metrics}
\label{tab:Table2}
\end{minipage}
\end{table}
\end{document}

Answer 2

It's a hidden feature in float that, when you do \restylefloat, the \caption command changes in a peculiar way: it stores its argument in a box which is assigned globally; only at \end{table} the box is used, which means that the first caption has been forgotten.

The package does so because it wants to enforce top or bottom position of the caption independently on the position the code for \caption is typed at. In the case of the plain style the position is bottom.

The effect of this is that after \restylefloat{table} you cannot use minipage to set two tables side by side.

Too bad, I agree.

On the other hand, you don't need to \restylefloat if you want to use [H] and you don't want to use [H] under any circumstances.