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<p class="MsoNormal"><span style="color:#1F497D">Hi again,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I found my mistake. It appears that even though the path costs infinity Dijkstra says that it found one and then “inf – inf = NaN” . It would be nice if bool run(source,target) returns false when the cost of
the path is infinite.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Vladimir<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:EN-GB">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:EN-GB"> lemon-user-bounces@lemon.cs.elte.hu
[mailto:lemon-user-bounces@lemon.cs.elte.hu] <b>On Behalf Of </b>Todorov, Vladimir<br>
<b>Sent:</b> Thursday, March 07, 2013 3:54 PM<br>
<b>To:</b> lemon-user@lemon.cs.elte.hu<br>
<b>Subject:</b> [Lemon-user] Dijkstra Problem<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi guys,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I use the Dijkstra class to find a shortest path in a graph. My graph has some costs, which are set to std::numeric_limits<double>::infinity(). When I get the path I backtrack it to compute the distance between each node on it and the
target node. However, sometimes I get a result of NaN. I checked my edge costs and there is no NaN in them before I pass them to the algorithm. Can you help me here? Do I do something wrong or is the algorithm not foreseen to handle infinities as edge costs?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Vladimir<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB">Vladimir Todorov</span><span style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
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