Table Just below a figure

Question

I need to place a table just below a figure in a single page. The table is an explanation of figure so it should not move to next page. I am expecting figure and table at the middle of the page. Please help me

\documentclass[a4paper,12pt]{article}
\usepackage{graphicx}
\begin{document}
\begin{figure}[h]
\includegraphics[width=1\textwidth,totalheight=0.6\textheight]{my figure}
\label{fig.1}
\end{figure}
\begin{center}
\begin{tabular}{|l|l|l|l|l|l|}
\hline
Channel No &1&2&3&4&5\\
\hline
Wavelength ($\mu$m) &7.43&11.03&12.02&12.66&14.08\\
\hline
\end{tabular}
\end{center}
\end{document}

Answer 1

Unless the "explanatory table" should have its own, separate \caption, you needn't do anything special. Just include the tabular material inside the figure environment. More specifically, (a) start the figure environment, (b) insert the graph (via an \includegraphics or similar statement), (c) insert a tabular-like environment, (d) provide a \caption statement, either at the top or bottom of the figure environment, and (e) end the figure environment.

---

Update, after the OP posted an MWE (minimum working example). The preceding suggestion applies to your case. The only addition is that I'd insert either \medskip or \bigskip between the end of the graph and the start of the tabular environment.

\documentclass[a4paper,12pt]{article}
\usepackage[demo]{graphicx} % remove 'demo' option in real document
\usepackage{siunitx} % for '\si' macro
\usepackage{array}   % for '\extrarowheight' macro
\begin{document}

\begin{figure}[h]
\setlength\extrarowheight{2pt} % for a less-cramped "look"
\centering
\caption{Some result} \label{fig.1}

\medskip
\includegraphics[width=1\textwidth,height=0.6\textheight]{my figure}

\bigskip
\begin{tabular}{|l|l|l|l|l|l|}
\hline
Channel No &1&2&3&4&5\\
\hline
Wavelength (\si{\micro\meter}) &7.43&11.03&12.02&12.66&14.08\\
\hline
\end{tabular}

\end{figure}
\end{document}