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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I’m still not entirely sure what you’re getting at: spatial correlation of origin/destination locations to each other? Or some characteristic of the origin/destination pairs? It sounds like the latter, but then the question is “correlated with what”?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The choice of method is ultimately driven by the conceptual model of the phenomena, which is what those questions are getting at. If you can answer those questions with some precision, finding an analytic method that can implement the resulting model is fairly straightforward.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>If you’re still trying to sharpen your thinking (or even if you think you have the abstractions nailed down and are just looking for corresponding methods), I’d recommend starting with the “spatstat” package (e.g. via the website <a href="http://www.spatstat.org">www.spatstat.org</a>) and following its reference list into the world of spatial statistics.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>If you’re actually interested in stolen cars, you might take a look at CrimeStat (<a href="http://www.icpsr.umich.edu/CrimeStat/">http://www.icpsr.umich.edu/CrimeStat/</a>) which rolls up implementations of a lot of spatial statistics techniques that could be applicable in tracking crimes and finding criminals. The software is “free as in beer” but it is not implemented in R (though I suppose one might be able to wrap the provided library functions). The various analytic methods are mostly standard and reasonably well documented, so any given analysis could be quite readily reproduced in the statistical system of your choice.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I hope that helps!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Jeremy Raw, P.E.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>FHWA Office of Planning<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="jeremy.raw@dot.gov"><span style='color:blue'>jeremy.raw@dot.gov</span></a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>(202) 366-0986<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Rich Heimann [mailto:heimann.richard@gmail.com] <br><b>Sent:</b> Wednesday, October 12, 2011 7:26 PM<br><b>To:</b> Raw, Jeremy<br><b>Cc:</b> r-sig-geo@r-project.org<br><b>Subject:</b> Re: [R-sig-Geo] Correlation between O&D<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-family:"Verdana","sans-serif"'>Great! I hope you can tell me more. <br><br>I am considering origin and destination to be linked data... Such as a stolen car and a recovered car - rather than an independent point pattern. I hope that clears things up? <br><br>Regards,<br>Rich</span><o:p></o:p></p><div id="WISESTAMP_SIG_8054"><div><div style='border:none;border-top:solid #E5E5E5 1.0pt;padding:10.0pt 0in 0in 0in'><div style='margin-bottom:6.0pt'><p style='margin:0in;margin-bottom:.0001pt'><strong><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray'>Rich Heimann</span></strong><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><o:p></o:p></span></p><p style='margin:0in;margin-bottom:.0001pt'><em><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray'> </span></em><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray'>Tel: (571) 403-0119</span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#FF6600'> </span><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><br></span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:blue'><a href="mailto:heimann.richard@gmail.com">heimann.richard@gmail.com</a></span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif"'> </span><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><o:p></o:p></span></p></div></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";border:solid windowtext 1.0pt;padding:0in'><img border=0 width=1 height=1 id="_x0000_i1025" src="cid:image001.jpg@01CC897D.4825DCE0" alt="Image removed by sender."></span><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><o:p></o:p></span></p></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><p class=MsoNormal>On Wed, Oct 12, 2011 at 3:16 PM, <<a href="mailto:jeremy.raw@dot.gov">jeremy.raw@dot.gov</a>> wrote:<o:p></o:p></p><p class=MsoNormal>It all depends on what you mean by "origin and destination data".<br>Assuming I am allowed to make up my own definitions, the answer is<br>definitely "yes" :-)<br><br>My advice is to be somewhat more specific about the problem domain.<br><br>Jeremy Raw, P.E.<br>FHWA Office of Planning<br><a href="mailto:jeremy.raw@dot.gov">jeremy.raw@dot.gov</a><br><a href="tel:%28202%29%20366-0986">(202) 366-0986</a><br><br><br>-----Original Message-----<br>From: <a href="mailto:r-sig-geo-bounces@r-project.org">r-sig-geo-bounces@r-project.org</a><br>[mailto:<a href="mailto:r-sig-geo-bounces@r-project.org">r-sig-geo-bounces@r-project.org</a>] On Behalf Of Rich Heimann<br>Sent: Wednesday, October 12, 2011 2:24 PM<br>To: <a href="mailto:r-sig-geo@r-project.org">r-sig-geo@r-project.org</a><br>Subject: [R-sig-Geo] Correlation between O&D<o:p></o:p></p><div><p class=MsoNormal><br>Hello all,<br><br>I want to know if the list is aware of a way to determine whether origin<br>and<br>destination data is correlated - rather than looking at each as<br>independent?<br>Any advise?<br><br>Thanks,<br>Rich<br><br>Rich Heimann<br><br> Richard Heimann | ITT Corporation | T: <a href="tel:571.403.0119">571.403.0119</a> |<br><a href="mailto:richard.heimann@itt.com">richard.heimann@itt.com</a><br>Richard Heimann | University of Maryland, Baltimore County | T:<br><a href="tel:571.403.0119">571.403.0119</a><br>| <a href="mailto:rheimann@umbc.edu">rheimann@umbc.edu</a><o:p></o:p></p></div><p class=MsoNormal>Contact Me <<a href="http://www.linkedin.com/in/rheimann" target="_blank">http://www.linkedin.com/in/rheimann</a>><br>LinkedIn<<a href="http://www.linkedin.com/in/rheimann" target="_blank">http://www.linkedin.com/in/rheimann</a>><br><<a href="https://twitter.com/rheimann" target="_blank">https://twitter.com/rheimann</a>> Twitter <<a href="https://twitter.com/rheimann" target="_blank">https://twitter.com/rheimann</a>><br><<a href="https://plus.google.com/117471169530873553158" target="_blank">https://plus.google.com/117471169530873553158</a>> Google<br>Plus<<a href="https://plus.google.com/117471169530873553158" target="_blank">https://plus.google.com/117471169530873553158</a>><o:p></o:p></p><div><p class=MsoNormal>Chat [image: Google Talk] heimann.richard [image: Skype] heimann.rich<o:p></o:p></p></div><p class=MsoNormal> [image: Twitter] <<a href="http://twitter.com/rheimann" target="_blank">http://twitter.com/rheimann</a>> Latest tweet: An<o:p></o:p></p><div><p class=MsoNormal>Intuitive<br>Explanation of Bayes' Theorem: <a href="http://t.co/6DAh8O43" target="_blank">http://t.co/6DAh8O43</a><o:p></o:p></p></div><p class=MsoNormal>Follow @rheimann <<a href="http://twitter.com/rheimann" target="_blank">http://twitter.com/rheimann</a>> Reply<br><<a href="http://twitter.com/?status=@rheimann%20&in_reply_to_status_id=123943215%0A412953090&in_reply_to=rheimann" target="_blank">http://twitter.com/?status=@rheimann%20&in_reply_to_status_id=123943215<br>412953090&in_reply_to=rheimann</a>><br>Retweet<br><<a href="http://twitter.com/?status=RT%20%40rheimann%3A%20An%20Intuitive%20Expla" target="_blank">http://twitter.com/?status=RT%20%40rheimann%3A%20An%20Intuitive%20Expla</a><br>nation%20of%20Bayes%27%20Theorem%3A%20http%3A%2F%2Ft.co%2F6DAh8O43><br> 22:08 Oct-11<<a href="http://twitter.com/rheimann/statuses/123943215412953089" target="_blank">http://twitter.com/rheimann/statuses/123943215412953089</a>><br> Get this email app!<br><<a href="http://www.wisestamp.com/apps/twitter?utm_source=extension&utm_medium=e%0Amail&utm_term=twitter&utm_campaign=apps" target="_blank">http://www.wisestamp.com/apps/twitter?utm_source=extension&utm_medium=e<br>mail&utm_term=twitter&utm_campaign=apps</a>><o:p></o:p></p><div><p class=MsoNormal style='margin-bottom:12.0pt'><br> Please consider your environmental responsibility. 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