Band

The Band option requires that you enter a list such as ``a, b, c'' with an odd number of entries. This option creates a matrix with a ``band'' of entries around the main diagonal, up to the width of your list, and with zeroes elsewhere. The first entry will be the item in the middle of your list.


\begin{example}
\textsl{A }$2\times 2$\textsl{\ band matrix}
\par
From the \tex...
...}{cc}
a & 0 \\
0 & a
\end{array}
\right]
\end{displaymath}
\end{example}


\begin{example}
\textsl{Band matrices}
\par
From the \textsf{Fill Matrix} dialo...
...& 0 & a & b & c & 0 & 0
\end{array}
\right]
\end{displaymath}
\end{example}


\begin{example}
Choosing \textsf{Band} and entering the lists \lq\lq $0$,'' \lq\lq $1$,''...
... 0 & \lambda
\end{array}
\right]
\end{displaymath}
\medskip
\end{example}