??=[basics.entries]
A diagram is created by the commands
![\begin{defs1}
??c![\diagram]~\dots~??c![\enddiagram]
\end{defs1}](img4.png)
where the `...' should be replaced by "entries"??w[entry] to be
"aligned in rows and columns" where
- entries in a row are separated by ??c![&] and
- rows are separated by ??c![
].
For example,
was typeset by
Notice the following:
- entries are typeset as mathematics (in `text style'),
- all entries are centered,
- the separation between rows and columns is usually quite large in a
diagram,
- entries at the end of rows that are empty may be omitted, and most
importantly:
- ``-commands'' (like || and || here) can decorate an
entry and connect it with others without changing the diagram layout.
The style and spacing can be changed; we discuss that in
section ??[entries].
In "v3" several matrices can be typeset in the same picture (and
refer to each other's entries), and matrices can be rotated.
