Download presentation

1
Two-mode networks Kaibin He

2
**Outline Data structure Visualization Quantitative Analysis**

Qualitative Analysis

3
**Rectangular data array**

1 2 3 A B 1 2 3 A B

4
Two-mode to One-mode Data>Affiliations Cross-product(binary data) : multiplies each of A's scores by the corresponding score for B, and then sums across the columns A B 1 2 3 1 2 3 A B 1 2 3

5
Two-mode to One-mode Minimums (valued data): examines the entries of A and B for campaign 1, and selects the lowest score (zero). It then does this for the other campaigns and sums. A B 1 2 3 1 2 3 A B 1 2 3

6
Bipartite The matrix is formed by adding the rows as additional columns, and columns as additional rows. Transform>Bipartite A B 1 2 3 1 2 3 A B

7
**Visualization Netdraw>File>UCINET dataset>2-Mode Network**

Use scaling method to locate the points Example: Zhou, Yuan, Wang (2013)

8
**Quantitative analysis**

Identify underlying dimensions of the joint space of actor-by-event. Two-mode SVD analysis. (valued data)Tools>Scaling/Decomposition>SVD Two-mode factor analysis. (valued data)Tools>Scaling/Decomposition>Factor Analysis Two-mode correspondence analysis. (binary data)Tools>Scaling/Decomposition>Correspondence

9
**SVD Singular Values RCScores Row Scores Column Scores Scatter Plot**

Example

10
Factor Analysis Eigenvalues Loadings Scatter plot Example

11
**Correspondence analysis**

Row/Column Scores Scatter plot Example

12
**Qualitative analysis Block models Two-mode core-periphery analysis.**

Network>2-Mode>Categorical Core>Periphery Two-mode factions analysis Network>2-Mode>2-Mode Factions

13
**Two-mode core-periphery analysis**

The "core" is a cluster of frequently co-occurring actors and events. The "periphery" consists of a partition of actors who are not co-incident to the same events. 0 means bad fit, 1 means excellent fit. Ideal density matrix 1 2

14
**Two-mode factions analysis**

Factions are groupings that have high density within the group, and low density of ties between groups. Example

15
**Recommended paper The Quest for Content: How User-Generated**

Links Can Facilitate Online Exploration JACOB GOLDENBERG, GAL OESTREICHER-SINGER, and SHACHAR REICHMAN JMR, 2012

16
**Is social network important to e-business?**

18
**product pages linked by hyperlinks & user generated links**

24
conclusion This dual-network structure in facilitating content exploration.

Similar presentations

Presentation is loading. Please wait....

OK

Matrix Operations.

Matrix Operations.

© 2018 SlidePlayer.com Inc.

All rights reserved.

To ensure the functioning of the site, we use **cookies**. We share information about your activities on the site with our partners and Google partners: social networks and companies engaged in advertising and web analytics. For more information, see the Privacy Policy and Google Privacy & Terms.
Your consent to our cookies if you continue to use this website.

Ads by Google

Ppt on recycling of waste plastic Ppt on autonomous cars Make a ppt on how to control noise pollution Ppt on job evaluation process Ppt on surface tension of water Ppt on air pollution Ppt on op amp circuits explained Ppt on polynomials of 911 Ppt on chapter iv of companies act 2013 Ppt on single phase and three phase dual converter/adapter