[Xy-pic] xypic question: Merging entries

[Richard Lewis]

Pedro Adão <pad at math.ist.utl.pt> writes:

> I am trying to merge/collapse entries in a xypic matrix, for instance
>
> _________________
> | A | B | C | D |
> |  FGH  |  IJK  |
> | L |  MNO  | P |
>
> Can you help me?

not exactly what you asked for, but:

Solution 1: use xymatrix and extra cells
\[
\xymatrix at R=1.5em at C=.5em{ A &     & B   && C &    & D \\
             & FGH &     &&   & IJK    \\
           L &     & MNO &&   &    & P}
\]

(the @R and @C make spacing comparable to
\[
\xymatrix{A & B & C & D\\
          FGH & IJK\\
          L & MNO & P}
\]
)


Solution 2: use xygraph with fractional hops
\[
\newgraphescape{Z}[2]{!{0;<#1,0pc>:<0pc,#2>::0}} %set scale to #1 by #2
\xygraph{!Z{5em}{3em}
         A="top" [r] B [r] C [r] D
"top"[d(1)r(.5)]{FGH}  [r(2)] {IJK}
"top"[d(2)] L [r(1.5)] {MNO} [r(1.5)] P}
\]
(this time it's the arguments to !Z that control the spacing)