# [Xy-pic] Re: positioning in XY-Pic, redux

**Ross Moore
**
ross@ics.mq.edu.au

*Wed, 22 May 2002 13:17:41 +1000 (EST)*

>* Pardon me, the editor blew up. :)
*>*
*>* So,
*>*
*>* how does one place a collection of circles with prescribed radii and
*>* prescribed centers into an XY-Pic box?
*>*
*>* Let's hardcode all the dimensions. By analogy with, say,
*>*
*>* \begin{xy}
*>* <1cm,1cm>*{11}
*>* ,<2cm,2cm>*{22}
*>* ,<0cm,2cm>*{02}
*>* ,<2cm,0cm>*{20}
*>* \end{xy}
*>*
*>* I was hoping this would work:
*>*
*>* \begin{xy}
*>* {\ellipse<1cm>{}}
*>* ,<0cm,1cm>{\ellipse<2cm>{}}
*>* ,<1cm,0cm>{\ellipse<3cm>{}}
*>* \end{xy}
*>*
*>* But it doesn't, since XY-Pic doesn't even pick up the "coordinates"
*>* <1cm,0cm>, and just pastes the third circle with its center somewhere at
*>* the "current c", which is a part of the second circle.
*>*
*>* Does this have to do with the fact that \ellipse is a "decor", or with
*>* some fundamental misunderstanding on my part as to how XY-Pic thinks of
*>* the "c" and "p" positions, and the syntax of moving them?
*
Yes, it is related to this.
The correct syntax is:
,<0cm,1cm>,{\ellipse<2cm>{}}
^------------------- need this
,<1cm,0cm>,{\ellipse<3cm>{}}
^------------------- and this
See:
http://www-texdev.ics.mq.edu.au/BEKE/xytest/
>*
*>* Please let me know, as basically this is what's keeping me from being able
*>* to complete a paper! :)
*>*
*>* Thanks greatly,
*
Hope this helps,
Ross
>* Tibor Beke (Dept. Math, U. Michigan, USA)
*>*
*