\documentclass{amsart}
\usepackage{graphicx}

\begin{document}
\begin{center}
{\bf {\large Additional Notes in LaTeX}}
\end{center}

\bigskip
\begin{enumerate}

\item {\bf Arrays of Data:}

Here is a sample table of data in LaTeX:
\begin{verbatim}
$$
\begin{array}{c|ccc}
     &\mbox{First} &\mbox{Second} & \mbox{Third} \\
\hline 
\mbox{Earth}  & 0.23 & 1.23 & 1.54 \\
\mbox{Mercury}& 0.54 & 1.00 & 0.75 
\end{array}
$$
\end{verbatim}

Which produces this:
$$
\begin{array}{c|ccc}
     &\mbox{First} &\mbox{Second} & \mbox{Third} \\
\hline
\mbox{Earth}  & 0.23 & 1.23 & 1.54 \\
\mbox{Mercury}& 0.54 & 1.00 & 0.75
\end{array}
$$

If you want to add another column (or multiple columns),
add extra ``c''s.  To add a fourth column for example,
\begin{verbatim}
$$
\begin{array}{c|cccc}
     &\mbox{First} &\mbox{Second} & \mbox{Third} &\mbox{Fourth}\\
\hline
\mbox{Earth}  & 0.23 & 1.23 & 1.54  & \\
\mbox{Mercury}& 0.54 & 1.00 & 0.75  & \\
\end{array}
$$
\end{verbatim}

The ampersand \verb+&+ is used to separate column entries 
in each row.  The double slash, \verb+\\+ is used to end the row.

\bigskip

\item {\bf Multiple Graphs in One Figure}

We can include multiple graphs in a single figure.
For example, if I have 4 related graphs in the postscript
files {\tt plot1.eps}, {\tt plot2.eps}, {\tt plot3.eps} and
{\tt plot4.eps}, then in LaTeX I can put them all in the same
figure with the commands:
\begin{verbatim}
\begin{figure}
\centering
\includegraphics[width=2.0in]{plot1}
\includegraphics[width=2.0in]{plot2}
\includegraphics[width=2.0in]{plot3}
\includegraphics[width=2.0in]{plot4}
\caption{This is an example of having multiple plots
in one figure.}
\label{MultPlot}
\end{figure}
\end{verbatim}

Here is the result of using this code (on the next page):
\begin{figure}
\centering
\includegraphics[width=2.0in]{plot1}
\includegraphics[width=2.0in]{plot2}
\includegraphics[width=2.0in]{plot3}
\includegraphics[width=2.0in]{plot4}
\caption{This is an example of having multiple plots
in one figure.}
\label{MultPlot}
\end{figure}


\end{enumerate}
\end{document}
