How to lnsert Centered Vertical Dots in a Table with Multiply lmages to Express Omit

Question

Sorry for the bother to everyone here! I have a question about vertical dots, generally, I'm now using \vdot in a table to express omit, but I want them to be centralized to express omit, the current codes are shown below:

\documentclass{article}
\usepackage{amssymb} % Add
\usepackage{bbding} % Add
\usepackage[export]{adjustbox}
\usepackage{array}
\usepackage{tabularx}
\usepackage{booktabs}
\usepackage{graphicx}
\usepackage{cellspace}
\def\tabularxcolumn#1{m{#1}}
\begin{document}
\begin{table}[htbp]
    \caption{Text.}
    \begin{tabularx}{\textwidth}{ l Sl X }
    \toprule
        Iterations & Samples & Comments \
    \midrule
        0     & \includegraphics[width=.6\textwidth,valign=M]{000000.png} & Text is always being here\
        32    & \includegraphics[width=.6\textwidth,valign=M]{000000.png} & Text \ 
        64    & \includegraphics[width=.6\textwidth,valign=M]{000000.png} & Text \
        128   & \includegraphics[width=.6\textwidth,valign=M]{000000.png} & Text \
        192   & \includegraphics[width=.6\textwidth,valign=M]{000000.png} & Text \
        \vdots & \vdots & \vdots \
        3200  & \includegraphics[width=.6\textwidth,valign=M]{000000.png} & Text \
    \bottomrule
    \end{tabularx}
    \label{tab4}
\end{table}
\end{document}

Please keep the gap between different rows and let all others align left, except nine dots. Thanks to everyone in advance!

Answer 1

Adaptations

• use example-image for the minimal working example (MWE)
  • added option height=20mm only for that example image
• use \multicolumn{1}{c}{\vdots} to align single cell centered (see Aligning inside tabular environment, specific cell)
• numbers should be right aligned in tables (better style)

Code

\documentclass{article}
\usepackage{amssymb} % Add
\usepackage{bbding} % Add
\usepackage[export]{adjustbox}
\usepackage{array}
\usepackage{tabularx}
\usepackage{booktabs}
\usepackage{graphicx}
\usepackage{cellspace}
\def\tabularxcolumn#1{m{#1}}
\begin{document}
\begin{table}[htbp]
    \caption{Text.}
    \begin{tabularx}{\textwidth}{ r Sl X }
    \toprule
        Iterations & Samples & Comments \
    \midrule
        0     & \includegraphics[width=.6\textwidth, height=20mm, valign=M]{example-image} & Text is always being here\
        32    & \includegraphics[width=.6\textwidth, height=20mm, valign=M]{example-image} & Text \ 
        64    & \includegraphics[width=.6\textwidth, height=20mm, valign=M]{example-image} & Text \
        128   & \includegraphics[width=.6\textwidth, height=20mm, valign=M]{example-image} & Text \
        192   & \includegraphics[width=.6\textwidth, height=20mm, valign=M]{example-image} & Text \
        \vdots & \multicolumn{1}{c}{\vdots} & \multicolumn{1}{c}{\vdots} \
        3200  & \includegraphics[width=.6\textwidth, height=20mm, valign=M]{example-image} & Text \
    \bottomrule
    \end{tabularx}
    \label{tab4}
\end{table}
\end{document}

Result