<div dir="ltr">You can implement any functions you want using stored procedures with plpsql.  Alternatively, you can write functions in C and bind them to postgis.  <div><br></div><div style>plpgsql guide: <a href="http://www.postgresql.org/docs/9.1/static/plpgsql.html">http://www.postgresql.org/docs/9.1/static/plpgsql.html</a></div>
<div style>c functions guide: <a href="http://www.postgresql.org/docs/9.1/static/xfunc-c.html">http://www.postgresql.org/docs/9.1/static/xfunc-c.html</a></div><div style><br></div><div style>best of luck.</div><div style>
<br></div><div style>-Adam</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, May 17, 2013 at 5:07 AM, Tina Musa <span dir="ltr"><<a href="mailto:timuso@yahoo.gr" target="_blank">timuso@yahoo.gr</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="HOEnZb"><div class="h5"><div><div style="font-size:10pt;font-family:arial,helvetica,sans-serif"><div><span style="font-size:10pt">hello,</span><br>
</div><div style="font-family:arial,helvetica,sans-serif;font-size:10pt"><div style="font-family:'times new roman','new york',times,serif;font-size:12pt"><div><div><div style="font-size:10pt;font-family:arial,helvetica,sans-serif">
<div><br></div><div style="font-style:normal;font-size:13px;background-color:transparent;font-family:arial,helvetica,sans-serif">i am a student and i need help with postgis.</div><div style="font-style:normal;font-size:13px;background-color:transparent;font-family:arial,helvetica,sans-serif">
i want to implement a algorithm (<b style="font-size:10pt;font-family:sans-serif;line-height:19.1875px">Yen's algorithm</b><span style="font-size:10pt;font-family:sans-serif;line-height:19.1875px"> computes  </span><i style="font-size:10pt;font-family:sans-serif;line-height:19.1875px">K</i><span style="font-size:10pt;font-family:sans-serif;line-height:19.1875px">-shortestpaths</span><span style="background-color:transparent">).</span></div>
<div style="font-style:normal;font-size:13px;background-color:transparent;font-family:arial,helvetica,sans-serif"><span style="background-color:transparent">if can somebody help me ???</span></div><div style="font-style:normal;font-size:13px;background-color:transparent;font-family:arial,helvetica,sans-serif">
<span style="background-color:transparent"><br></span></div><div style="font-style:normal;font-size:13px;background-color:transparent;font-family:arial,helvetica,sans-serif"><span style="background-color:transparent"> thank you in avdance</span><br>
</div></div></div><br><br></div> </div> </div>  </div></div></div></div><br>_______________________________________________<br>
postgis-users mailing list<br>
<a href="mailto:postgis-users@lists.osgeo.org">postgis-users@lists.osgeo.org</a><br>
<a href="http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users" target="_blank">http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users</a><br>
<br></blockquote></div><br></div>