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<TITLE>Re: [Rsiena-help] Matching matrices</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Thanks Nathan – especially for the quick response!<BR>
<BR>
The problem is that the matrices don’t match up in any way. The actors are the same from matrix 1 to matrix 2 to matrix 3, but if actor D is not present at time 2, he simply doesn’t show up in the matrix.<BR>
<BR>
In other words, if matrix 1 has the following actors:<BR>
<BR>
1, 2, 3, 4, 5, 6, 7, 8, 9, 10<BR>
<BR>
But actors 3, 6, 9 and 10 are not present in the matrix at time 2, then the header for matrix 2 would be as follows:<BR>
<BR>
1, 2, 4, 5, 7, 8<BR>
<BR>
So I would then need to reinsert the missing headers and the structural zeros.<BR>
<BR>
I could be missing something from what you’ve said, but I’ve been through the manual a few times looking for solutions to this and wasn’t able to find a clear answer. I’d like to find a way to code this through R, or even to force a shortcut in UCINET, because with 8 waves and up to 2000 actors in each wave.<BR>
<BR>
As I said, I may be missing something...<BR>
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Thanks Again,<BR>
Matt<BR>
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On 6/24/11 3:30 PM, "Nate Doogan" <<a href="doogan.1@osu.edu">doogan.1@osu.edu</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Hey Matt.<BR>
<BR>
Take a look at the RSiena manual for some examples. There's some examples with Pajek data, specifically.<BR>
<BR>
Generally speaking, I believe there are two methods of indicating structurally missing values--structural zeros (value 10) placed directly within the matrices, and the creation of an exogenous events file (manual section 2.1). The latter allows more precision if you know exactly when actors left the setting.<BR>
<BR>
Nathan Doogan<BR>
Doctoral Student<BR>
The Ohio State University<BR>
<BR>
On Fri, Jun 24, 2011 at 3:21 PM, Matthew Weber <<a href="mattsweber@gmail.com">mattsweber@gmail.com</a>> wrote:<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Hi All,<BR>
<BR>
I'm working with a new set of longitudinal data tracking interactions<BR>
between members of a large corporation. I have eight waves of data in a<BR>
network format, but the number of actors change by wave - anywhere from 1200<BR>
to 2000 + basic attributes.<BR>
<BR>
I'd like to analyze the behavioral patterns in this data using RSiena, but<BR>
am not quite sure how to handle the changes in the number of actors.<BR>
<BR>
Is there an easy way in R to insert structural zeros for this data? Any<BR>
suggestions on the best format to use?<BR>
<BR>
I currently have the data in matrix form and pajek.net <<a href="http://pajek.net">http://pajek.net</a>> . I'm stumped as to<BR>
how best to get this into a format that RSiena will work with, and my brain<BR>
is a bit fried. Any help is greatly appreciated.<BR>
<BR>
Thanks,<BR>
Matt<BR>
<BR>
<BR>
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Matthew S. Weber<BR>
Postdoctoral Research Associate<BR>
Center for Technology, Entertainment and Media (CTEM)<BR>
Fuqua School of Business<BR>
Duke University<BR>
<BR>
<a href="matthew.weber@duke.edu">matthew.weber@duke.edu</a><BR>
(ph) 919.660.2894 <tel:919.660.2894> <BR>
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</SPAN></FONT></BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
==================================<BR>
<BR>
Matthew S. Weber<BR>
Postdoctoral Research Associate<BR>
Center for Technology, Entertainment and Media (CTEM)<BR>
Fuqua School of Business<BR>
Duke University<BR>
<BR>
<a href="matthew.weber@duke.edu">matthew.weber@duke.edu</a><BR>
(ph) 919.660.2894<BR>
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