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Subject:

Re: Dealing with infinite geodesic distance

From:

Rojas, Fabio Guillermo

Date:

Tue, 22 May 2007 14:14:23 -0400

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 ```***** To join INSNA, visit http://www.insna.org ***** In a regression framework, you could create dummy variable for various distances (e.g., geo distance<3, 3<= dist < 5, etc) and then simply create a dummy variable for "more than X," where X is the observed maximum. Then, you could include the pairs in a data set without worrying that you have falsely assumed a finite distance. The maximal distance is simply a categorical variable. Fabio -----Original Message----- From: Social Networks Discussion Forum [mailto:[log in to unmask]] On Behalf Of Guy Hagen Sent: Tuesday, May 22, 2007 11:48 AM To: [log in to unmask] Subject: Re: Dealing with infinite geodesic distance ***** To join INSNA, visit http://www.insna.org ***** While analytically, I think you want to be careful about the implications of dropping infinite distances, I have found it useful for graphing and similar applications to assign an arbitrary distance of n (the number of nodes/actors), since the maximum width of a connected graph is n-1. Plotting infinity, or things like average distance, become incalculable when infinities are present. I'm not sure there is a "right" answer. G On May 20, 2007, at 6:39 PM, Corey Phelps wrote: > ***** To join INSNA, visit http://www.insna.org ***** > > I have computed the geodesic distances for all possible dyadic > combinations > of actors in a network. The network is not completely connected and > thus for > some dyads, there is no path between them. Theoretically, the geodesic > distance between two such actors is infinity. One approach would be > to drop > dyadic observations with an infinite path length from my analysis > and treat > them as missing data. However, I am looking for suggestions about > assigning > an actual value for distance (or a transformation thereof) for such > dyads so > they do not fall out of my analysis. I would appreciate any and all > help > from the list. Thanks. > > Corey > > Corey Phelps, PhD > Asst. Professor, Management & Organization > University of Washington Business School > Box 353200 > Seattle, WA 98195 > (206) 543-6579 Guy Hagen, President Innovation Insight, Inc. 27810 Sky Lake Circle Wesley Chapel, FL 33543 http://innovationinsight.com/ 813.997.2111 _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.insna.org). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message. _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.insna.org). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message.```