<div dir="ltr"><font face="arial, helvetica, sans-serif">Good afternoon all,</font><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">I joined the mailing list hoping for some suggestions with a problem I'm having.  I've previously used xymatrix, but for a paper I'm working on I need the ability to put lines with arrows at arbitrary locations in x-y space.  In the following MWE <span style="color:rgb(36,39,41);line-height:19.5px">I specified two points and then drew a line between them. From the xy-pic reference manual I used `?>*' to combine two commands and then tried to add an arrow head to the end of my line.</span></font></div><div><span style="color:rgb(36,39,41);line-height:19.5px"><font face="arial, helvetica, sans-serif"><br></font></span></div><div><div><pre style="white-space:pre-wrap;margin-top:0px;margin-bottom:1em;padding:5px;border:0px;width:auto;max-height:600px;overflow:auto;word-wrap:normal"><code style="margin:0px;padding:0px;border:0px;white-space:inherit"><font face="arial, helvetica, sans-serif" color="#000000"><span style="margin:0px;padding:0px;border:0px">\documentclass</span><span style="margin:0px;padding:0px;border:0px">{</span><span style="margin:0px;padding:0px;border:0px">article</span><span style="margin:0px;padding:0px;border:0px">}</span><span style="margin:0px;padding:0px;border:0px">
</span><span style="margin:0px;padding:0px;border:0px">\usepackage</span><span style="margin:0px;padding:0px;border:0px">[</span><span style="margin:0px;padding:0px;border:0px">all</span><span style="margin:0px;padding:0px;border:0px">]{</span><span style="margin:0px;padding:0px;border:0px">xy</span><span style="margin:0px;padding:0px;border:0px">}</span><span style="margin:0px;padding:0px;border:0px">

</span><span style="margin:0px;padding:0px;border:0px">\begin</span><span style="margin:0px;padding:0px;border:0px">{</span><span style="margin:0px;padding:0px;border:0px">document</span><span style="margin:0px;padding:0px;border:0px">}</span><span style="margin:0px;padding:0px;border:0px">

</span><span style="margin:0px;padding:0px;border:0px">\xy</span><span style="margin:0px;padding:0px;border:0px">
</span><span style="margin:0px;padding:0px;border:0px">(</span><span style="margin:0px;padding:0px;border:0px">0,0</span><span style="margin:0px;padding:0px;border:0px">)=</span><span style="margin:0px;padding:0px;border:0px">"A",
</span><span style="margin:0px;padding:0px;border:0px">(</span><span style="margin:0px;padding:0px;border:0px">15,15</span><span style="margin:0px;padding:0px;border:0px">)=</span><span style="margin:0px;padding:0px;border:0px">"B",
"A";"B"**@</span><span style="margin:0px;padding:0px;border:0px">{</span><span style="margin:0px;padding:0px;border:0px">.</span><span style="margin:0px;padding:0px;border:0px">}</span><span style="margin:0px;padding:0px;border:0px">?>*</span><span style="margin:0px;padding:0px;border:0px">{</span><span style="margin:0px;padding:0px;border:0px">></span><span style="margin:0px;padding:0px;border:0px">}</span><span style="margin:0px;padding:0px;border:0px">,
</span><span style="margin:0px;padding:0px;border:0px">\endxy</span><span style="margin:0px;padding:0px;border:0px">

</span><span style="margin:0px;padding:0px;border:0px">\end</span><span style="margin:0px;padding:0px;border:0px">{</span><span style="margin:0px;padding:0px;border:0px">document</span><span style="margin:0px;padding:0px;border:0px">}</span></font></code></pre></div><div><font face="arial, helvetica, sans-serif"><span style="color:rgb(0,0,0);line-height:19.5px">From the MWE the arrow head appears but it is not in the same direction as the line.  I would appreciate any assistance the group could offer.</span><br></font></div><div><span style="line-height:19.5px"><font face="arial, helvetica, sans-serif" color="#000000"><br></font></span></div><div><span style="line-height:19.5px"><font face="arial, helvetica, sans-serif" color="#000000">Thank you,</font></span></div><div><span style="line-height:19.5px"><font face="arial, helvetica, sans-serif" color="#000000">Ryan Sherrill</font></span></div></div></div>