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Updated «array» section

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Kenneth John Odle 2023-10-28 16:00:58 -04:00
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@ -883,17 +883,17 @@ You can typeset matrices and other similar objects using an \texttt{array} envir
\begin{itemize}[noitemsep] \begin{itemize}[noitemsep]
\item \texttt{array} can only be used in a math environment. \item \texttt{array} can only be used in a math environment.
\item You must declare the number and alignment of the columns by using \verb+\begin{array}{crl}+. In this instance, we are declaring one centered column, one right-aligned column, and one left-aligned column. \item You must declare the number and alignment of the columns by using something like this:\vspace{0.5em} \\ \vspace{0.5em} \verb+\begin{array}{crl}+ \\ In this instance, we are declaring one centered column, one right-aligned column, and one left-aligned column.
\end{itemize} \end{itemize}
In the example below, I've chose animal names to make the column alignment more explicit. In the example below, I've chose animal names to make the column alignment more explicit.
\begin{Verbatim}[frame=lines, numbers=left, xleftmargin=5mm, framesep=3mm, breaklines=true, label=array Example] \begin{Verbatim}[frame=lines, numbers=left, xleftmargin=5mm, framesep=3mm, breaklines=true, label=\fbox{array Example}]
\[ \[
Zoo~animals = \left\{ \begin{array}{crl} Zoo~animals = \left\{ \begin{array}{crl}
lion & hippopotamus & gnu \\ lion & hippopotamus & gnu \\
elephant & zebra & kangaroo \\ elephant & zebra & kangaroo \\
bear & camel & wallaby bear & camel & naked~mole~rats
\end{array}\right\} \end{array}\right\}
\] \]
\end{Verbatim} \end{Verbatim}
@ -902,10 +902,12 @@ bear & camel & wallaby
Zoo~animals = \left\{ \begin{array}{crl} Zoo~animals = \left\{ \begin{array}{crl}
lion & hippopotamus & gnu \\ lion & hippopotamus & gnu \\
elephant & zebra & kangaroo \\ elephant & zebra & kangaroo \\
bear & camel & wallaby bear & camel & naked~mole~rats
\end{array}\right\} \end{array}\right\}
\] \]
\paragraph{Note:} Because the \texttt{array} environment is designed for math applications, rather than a text application like our example, I had to use a $\sim$ to add the spaces in ``naked mole rats''.
If the built-in \texttt{array} environment cannot do all that you want, use the \texttt{amsmath} package and its \texttt{matrix} environment, which provides more options. If the built-in \texttt{array} environment cannot do all that you want, use the \texttt{amsmath} package and its \texttt{matrix} environment, which provides more options.
\section{Special Math Environments} \section{Special Math Environments}