[Xy-pic] Using macros in xymatrix

[Andrew Clegg]

On 7/28/07, Ross Moore <ross at ics.mq.edu.au> wrote:
>
> Simply extend your \arr  macro above to a variant having a 2nd argument:
>
>      \newcommand{\arrlab}[2]{\ar@*{[|(2)]}[#1]|+[F]\txt{\tt #2}}
>
> Use it, for the above examples, as:
>
>          \lab{foo} \arr{r}
>          \arrlab{r}{bar}

Err, this doesn't quite work, sorry :-)

It compiles, the lines are right, but I only get a plus symbol in each
label (and no frame).

Example:

\xymatrix at +0.5cm{
& & *+\txt{\vdu{VBD} \xmpl{saw}} \arrlab{dl}{nsubj} \arrlab{dr}{dobj} & & \\
& *+\txt{\vdu{NN} \xmpl{man}} \arrlab{dl}{det} & &  *+\txt{\vdu{NN}
\xmpl{dog}} \arrlab{dr}{det} & \\
*+\txt{\vdu{DT} \xmpl{the}} & & & & *+\txt{\vdu{DT} \xmpl{the}}
}

Unless I'm using an out of date version or something? It's 3.7.

Cheers,

Andrew.