[Xy-pic] newbie question

[mike]

On 08/18/2011 10:01 PM, mike wrote:
> Hi
>
> I'm using "Xy-pic version 3.7 <1999/02/16>".  I have the following 
> example:
>
> \xymatrix @R=1pc {
> 1,1 & 1,2 & 1,3 \\
> 2,1 & 2,2 & 2,3 & \\
> 3,1 & 3,2 & 3,3
> \save "2,2"."3,3"!C="x99"*[F.]\frm{_\}}
> \restore}
>
> I understand that the "*[F.]" bit gives me the dotted frame but I want 
> an invisible frame.  I've done it this way because of the following 
> "\frm{_\}}" bit which is what I'm really after, i.e., I just want a 
> downward facing brace from "2,2" to "3,3".  If I get rid of "*[F.]" I 
> lose the bracket even with the "\frm{_\}}" bit still there.
>
> Can someone tell me how to do this?
>
> Cheers,
> Mike
>
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Sorry forgot to mention I invoke xypic like this:

\RequirePackage[color,all]{xy}
\UseCrayolaColors

Cheers,
Mike