Ajustando uma tabela que compara matrizes de covariância?

Question

Ei pessoal,

Estou fazendo esta tabela que compara matrizes de covariância, mas não consigo fazer duas coisas que desejo. Primeiro de tudo, quero que as matrizes tenham exatamente o mesmo tamanho (as de cima parecem maiores agora). Em segundo lugar, gostaria de ver a seta Sigma+ acima das outras duas matrizes também.

Alguém por favor pode me ajudar?

Meu código:

\begin{table}[H]
\caption{Covariance matrices using IME and sandwich form}\label{tab:2}
\vspace{-0.3cm}
\begin{adjustbox}{width=1\columnwidth, center}
\begin{tabular*}{\textwidth}{@{\extracolsep{\fill}} c c}
\toprule
 \textbf{Normally distributed errors} & \textbf{Student-t distributed errors} \\ 
\midrule 
$\Sigma_{IME}(\theta)$: \Longrightarrow \\ \[\left[ \begin{array}{ccc} \num{-2.05e-4} & \num{-7.16e-10} & \num{-2.42e-08} \\ \num{-7.16e-10} & \num{2.05e-04} & \num{2.71e-05} \\ \num{-2.42e-08} & \num{2.71e-05} & \num{2.64e-03} \end{array}\right]\]   & \[\left[ \begin{array}{ccc} \num{2.04e-08} & \num{-3.82e-12} & \num{-8.77e-12} \\ \num{-3.82e-12} & \num{4.11e-08} & \num{5.43e-09} \\ \num{-8.77e-12} & \num{5.43e-09} & \num{5.28e-07} \end{array}\right]\]  \\ 
$\Sigma_{Sandwich}(\theta)$: \Longrightarrow \\ \[\left[ \begin{array}{ccc} \num{6.58e-01} & \num{-1.64e-05} & \num{1.31e-04} \\ \num{-1.64e-05} & \num{2.04e-04} & \num{2.72e-05} \\ \num{1.31e-04} & \num{2.72e-05} & \num{2.64e-03}  \end{array}\right]\] & \[\left[ \begin{array}{ccc} \num{2.06e-08} & \num{3.85e-12} & \num{8.82e-12} \\ \num{3.85e-12} & \num{4.11e-08} & \num{5.44e-09} \\ \num{8.82e-12} & \num{5.44e-09} & \num{5.29e-07} \end{array}\right]\] \\
\midrule[\heavyrulewidth]            
\end{tabular*}
\end{adjustbox}
\centering
\end{table 

Answer 1

se alguém conseguir fazer esta tabela caber em uma página com os Sigmas em uma coluna separada à esquerda, ficarei ainda mais feliz!

Esperando te fazer feliz :-)

\documentclass{article}
\usepackage[letterpaper,margin=1in]{geometry}
\usepackage{amsmath,siunitx,booktabs,amssymb}
\newcolumntype{R}{>{$}r<{$}}
\newcolumntype{C}{>{$}c<{$}}
\begin{document}
\begin{table}[ht!]
\sisetup{table-format=-1.2e-2,tight-spacing}
\setlength\arraycolsep{2pt} % default: 5pt
\setlength\tabcolsep{0pt}

\caption{Covariance matrices using IME and sandwich form\strut}\label{tab:2}

\begin{tabular*}{\textwidth}{@{\extracolsep{\fill}} RCC}
\toprule
& \text{Normally distributed errors}
& \text{Student-$t$ distributed errors} \\ 
\midrule 
\Sigma_{\textrm{IME}}(\theta): \Longrightarrow &
\left[ \begin{array}{@{}SSS@{}} 
-2.05e-4  & -7.16e-10 & -2.42e-08 \\ 
-7.16e-10 &  2.05e-04 &  2.71e-05 \\ 
-2.42e-08 &  2.71e-05 &  2.64e-03
\end{array}\right]
  & 
\left[ \begin{array}{@{}SSS@{}} 
 2.04e-08 & -3.82e-12 & -8.77e-12 \\ 
-3.82e-12 &  4.11e-08 &  5.43e-09 \\ 
-8.77e-12 &  5.43e-09 &  5.28e-07 
\end{array}\right]
\\  \addlinespace
\Sigma_{\textrm{Sandwich}}(\theta): \Longrightarrow &
\left[ \begin{array}{@{}SSS@{}} 
 6.58e-01 & -1.64e-05 & 1.31e-04 \\ 
-1.64e-05 &  2.04e-04 & 2.72e-05 \\ 
 1.31e-04 &  2.72e-05 & 2.64e-03  
\end{array}\right]
 & 
\left[ \begin{array}{@{}SSS@{}} 
2.06e-08 & 3.85e-12 & 8.82e-12 \\ 
3.85e-12 & 4.11e-08 & 5.44e-09 \\ 
8.82e-12 & 5.44e-09 & 5.29e-07 
\end{array}\right]
\\
\bottomrule           
\end{tabular*}

\end{table}
\end{document}

Answer 2

Com o uso do siunitxpacote:

\documentclass{article}
\usepackage{geometry}
\usepackage{siunitx}
\usepackage{booktabs, tabularx}

\begin{document}
    \begin{table}[ht]
    \sisetup{table-number-alignment = center,
             table-figures-integer = 2,
             table-figures-decimal = 2,
             table-figures-exponent = 2,
             }
    \renewcommand\arraystretch{1.2}

\caption{Covariance matrices using IME and sandwich form}
\label{tab:2}

\begin{tabularx}{\textwidth}{ *{2}{>{$}X<{$}} }
    \toprule
    \addlinespace
    \textbf{Normally distributed errors}
    &   \textbf{Student-t distributed errors}       \\
    \midrule
\Sigma_{\text{IME}}(\theta):\quad \Longrightarrow
    &                           \\
    \left[\begin{tabular}{SSS}
-2.05e-4    &   -7.16e-10   &   -2.42e-08       \\
-7.16e-10   &    2.05e-04   &    2.71e-05       \\
-2.42e-08   &    2.71e-05   &   2.64e-03
    \end{tabular}\right]
    &   \left[\begin{tabular}{SSS}
     2.04e-08   &   -3.82e-12   &   -8.77e-12   \\
    -3.82e-12   &    4.11e-08   &    5.43e-09   \\
    -8.77e-12   &    5.43e-09   &    5.28e-07
    \end{tabular}\right]        \\
% second row
    \addlinespace
\Sigma_{\text{Sandwich}}(\theta):\quad \Longrightarrow
    &                           \\ 
    \left[\begin{tabular}{SSS}
 6.58e-01   &   -1.64e-05   &   1.31e-04        \\
-1.64e-05   &    2.04e-04   &   2.72e-05        \\
 1.31e-04   &    2.72e-05   &   2.64e-03  
    \end{tabular}\right]
    &   \left[\begin{tabular}{SSS}
    2.06e-08    &   3.85e-12    &   8.82e-12    \\
    3.85e-12    &   4.11e-08    &   5.44e-09    \\
    8.82e-12    &   5.44e-09    &   5.29e-07
        \end{tabular}\right]    \\
    \addlinespace
    \bottomrule
\end{tabularx}
    \end{table}
\end{document}