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Dear colleagues,

Another solution is to consider persons as units of analysis and 
relations to both individuals and groups as attributes. One obtains then 
an asymmetrical 2-mode matrix which can be multiplied with its 
transposed. The resulting matrix contains (1) interpersonal relations, 
(2) intergroup relations and (3) person-group relations.

We use this methodology, for example, in:
Hellsten, I., & Leydesdorff, L. (in preparation). Automated Analysis of 
Topic-Actor Networks on Twitter: New approach to the analysis of 
socio-semantic networks. https://urldefense.proofpoint.com/v2/url?u=https-3A__arxiv.org_abs_1711.08387&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=uXI5O6HThk1ULkPyaT6h2Ws3RKNKSY__GQ4DuS9UHhs&m=V7WxVyrMbhVjulNg4ViCQyOQj-LBIxSP_br9Tr5tNYk&s=h9b33f9leL9DXs6Wexj1pfXfdfkOuJQG1l1FylCt3RQ&e=.

My coauthor Iina Hellsten will present the paper at Sunbelt on Friday 
afternoon.

Best,
Loet

--------------------------------------------------------------------------------
Loet Leydesdorff

Professor emeritus, University of Amsterdam
Amsterdam School of Communication Research (ASCoR)

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------ Original Message ------
From: "Cody Buntain" <[log in to unmask]>
To: [log in to unmask]
Sent: 6/14/2018 8:12:23 PM
Subject: Re: AW: Question About Data Entry Format

>***** To join INSNA, visit https://urldefense.proofpoint.com/v2/url?u=http-3A__www.insna.org&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=uXI5O6HThk1ULkPyaT6h2Ws3RKNKSY__GQ4DuS9UHhs&m=V7WxVyrMbhVjulNg4ViCQyOQj-LBIxSP_br9Tr5tNYk&s=PCz0bOk-zZv4-QvUp2eAjK373fwcVHMkaPrfmaMzUoA&e= ***** Jurgen and Jamie 
>have already provided excellent answers. I’m only adding on 
>additional/alternate terminology.
>
>The 2-mode network you describe is a bipartite network with two node 
>types: one for groups, and one for people. In that construct, people 
>can only be connected to groups, and groups can only be connected to 
>people (edges between person-to-person or group-to-group are not 
>allowed). You can represent this type of network using the edge list 
>format Jurgen suggests really easily. E.g., a group is always in column 
>1 and a person is always in column 2 for example would ensure your 
>format is right for a bipartite graph.
>
>From there, you can project your data either way, to a Group-Group 
>network or a Person-Person network where a group is connected in the 
>projected graph if they share a person in the bipartite graph, or two 
>people are connected in the projection to person-person if they have a 
>common group in bipartite.
>
>Python’s NetworkX package has several projection functions in its 
>bipartite module that you play with these networks.
>
>Good luck!
>
>-Cody
>_________________
>Cody Buntain, PhD
>Postdoc, @NYU/UMD
>Intelligence Community Postdoctoral Fellow
>[log in to unmask]
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><https://urldefense.proofpoint.com/v2/url?u=http-3A__cody.bunta.in&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=uXI5O6HThk1ULkPyaT6h2Ws3RKNKSY__GQ4DuS9UHhs&m=l1J_-QId9WMJVbzm_hNsWyGdFMU_Z7Xdf1Htq60pemE&s=6vAzjWk5z8fc1nr029ks7Sq8SQkStmS5P6mEZQzIg6Q&e=>
>
>>On Jun 14, 2018, at 1:21 PM, Juergen Pfeffer <[log in to unmask]> 
>>wrote:
>>
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>><https://urldefense.proofpoint.com/v2/url?u=http-3A__www.insna.org_&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=uXI5O6HThk1ULkPyaT6h2Ws3RKNKSY__GQ4DuS9UHhs&m=l1J_-QId9WMJVbzm_hNsWyGdFMU_Z7Xdf1Htq60pemE&s=KQIG6ueHO_fOFLKvrD3GTxNg1x_S1hgc8pFLDAoZjtM&e=> 
>>*****
>>Matrix is fine an can be imported in most tools.
>>However, I prefer edge lists, i.e.:
>>Group A       Individual 1
>>Group A       Individual 2
>>Group B       Individual 1
>>Advantages:
>>- This is normally the way we collect data
>>- A line per edge allows for more edge attributes (additional columns)
>>- More compact for sparse matrices
>>- Easier to handle for large networks
>>
>>In any case, this gives you a 2-mode network. Transform it to a 1-mode 
>>(easy in any tool) and you’ll get your Group-Group network. There are 
>>different approaches how to “count” co-occurrence of Individuals. You 
>>can sum them. Or you can weigh them, e.g. if I1 and I2 are just in G1 
>>this might bring more “points” for G1 than I1 and I2 being everywhere. 
>>But this part should be derived from your questions. What do you want 
>>to analyze with this co-occurrence?
>>
>>
>>Von: Social Networks Discussion Forum [mailto:[log in to unmask]] Im 
>>Auftrag von Aaron Guest
>>Gesendet: Thursday, June 14, 2018 6:51 PM
>>An: [log in to unmask]
>>Betreff: [SOCNET] Question About Data Entry Format
>>
>>***** To join INSNA, visit https://urldefense.proofpoint.com/v2/url?u=http-3A__www.insna.org&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=uXI5O6HThk1ULkPyaT6h2Ws3RKNKSY__GQ4DuS9UHhs&m=V7WxVyrMbhVjulNg4ViCQyOQj-LBIxSP_br9Tr5tNYk&s=PCz0bOk-zZv4-QvUp2eAjK373fwcVHMkaPrfmaMzUoA&e= 
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>>*****
>>Hello Everyone,
>>
>>This may be too simple and I may be overthinking it but I was hoping 
>>to get some feedback on the best way to manage some data. I have 
>>individual records where everyone is a member of two to three groups. 
>>There is a total of about 30 groups people can be a member of, but 
>>each is a member of at least two.
>>
>>Now, we are not necessarily concerned about the individuals, but we 
>>need them to show the connection between the groups. We are really 
>>interested in the number of connections between the 30 groups and 
>>identifying areas of overlap and possible intervention to encourage 
>>collaboration among the silos.
>>
>>Currently, the data looks a little something like this:
>>(Example 1)
>>
>>Group A
>>Group B
>>Group C
>>Group D (…etc)
>>Individual 1
>>0
>>1
>>0
>>1
>>Individual 2
>>1
>>1
>>0
>>1
>>Individual 3
>>0
>>0
>>1
>>0
>>
>>One idea someone suggested was to alter the data as (example 2)
>>
>>Group A
>>Group B
>>Group C
>>Group D (…etc)
>>Group A
>>1
>>1
>>1
>>1
>>Group B
>>1
>>0
>>0
>>1
>>Group C
>>1
>>1
>>1
>>1
>>
>>
>>
>>
>>
>>
>>The challenge with this is that Group A could have 100-200 individuals 
>>who are a member of group A and group B.
>>
>>Is the data in example 1 the best way to handle it? Or is there an 
>>obvious solution I am blanking on right now?
>>
>>Thanks for any help-
>>
>>Aaron Guest, MPH, MSW, CPH
>>PhD Candidate in Gerontology
>>Graduate Center for Gerontology 
>><https://urldefense.proofpoint.com/v2/url?u=http-3A__www.uky.edu_publichealth_departments_graduate-2Dcenter-2Dgerontology&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=uXI5O6HThk1ULkPyaT6h2Ws3RKNKSY__GQ4DuS9UHhs&m=ntRQ741TtplumjTfTOG-GEX38vZgQGxrphEyj9iEnbA&s=aad7hlx3c5DoDn5wKhs95agF5oisRmKH6WYQgCw36tY&e=> 
>>| University of Kentucky
>>Multi-Disciplinary Science Building | 725 Rose Street, Room 448
>>864.617.9621 | [log in to unmask]
>>
>>
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