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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Dear Jeremy,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Thank you for pointing this out.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">In our first version of the paper, we forgot to take the square root of the result, leading to a squared Euclidean distance
that do not garantee the triangle inequality. We corrected this issue in the lastest version of the paper published in the Journal of the Royal Statistical Society: Serie A. However, the change was unfortunately not put in the latest development version of
seqdist2. Please excuse us for that. We plan to fix in the next upcoming days.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Future based costs are based on your data, this is why the results depend on your subset.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Matthias</span><span style="mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif">De :</span></b><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> traminer-users-bounces@lists.r-forge.r-project.org [mailto:traminer-users-bounces@lists.r-forge.r-project.org]
<b>De la part de</b> Jeremy Reynolds<br>
<b>Envoyé :</b> vendredi 14 août 2015 19:57<br>
<b>À :</b> traminer-users@lists.r-forge.r-project.org<br>
<b>Objet :</b> [Traminer-users] violation of triangle inequality with future based substitution costs<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Dear Traminer Experts,<o:p></o:p></p>
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<p class="MsoNormal">I have been using future based substitution costs as described in Studer and Ritschard 2014 and implemented in Traminer to make dissimilarity matrices. Unfortunately, the results often violate the triangle inequality. It seems to depend
on what subset of my data I use, but I don't really know why the triangle inequality is violated in some cases and not in others.
<o:p></o:p></p>
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<p class="MsoNormal"><br>
Is there some appropriate way to fix this (e.g. alter one of the substitution costs manually)? Does the violation suggest that there is a problem somewhere else in my analysis or suggest something about my data?
<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I have pasted the output from my latest analysis below in case it is useful.
<br>
<br>
Thanks,<o:p></o:p></p>
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<p class="MsoNormal">Jeremy<o:p></o:p></p>
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<p class="MsoNormal" style="mso-line-height-alt:11.25pt"><o:p> </o:p></p>
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-- <o:p></o:p></p>
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<p class="MsoNormal">********************<br>
Dr. Jeremy Reynolds<br>
Professor<br>
Department of Sociology<br>
116 Baldwin Hall<br>
University of Georgia<br>
Athens, GA 30602-1611<br>
Phone: (706) 583-8072<br>
Web: <a href="http://uga.edu/soc/people/faculty/reynolds_jeremy.php" target="_blank">
http://uga.edu/soc/people/faculty/reynolds_jeremy.php</a><br>
Fax: (706) 542-4320<o:p></o:p></p>
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