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How to import matrix data into NodeXL

09JanMay 7, 2015 By Marc Smith

Some network data sets are created or received in the form of a matrix.

A matrix can be directed or undirected.  In this example, we will import a directed network.

First open a blank NodeXL template.

Next open the matrix workbook in the same instance of Excel (just drag it into the title bar of the current NodeXL Excel instance).

Here is a simple asymmetric matrix with weights for tie strengths.
2015-NodeXL-Matrix Data

To import this matrix, switch back to NodeXL and select the Data>Import>From Open Matrix Workbook:
2015-NodeXL-Matrix Import
A matrix may or may not have labels (row and column headers) and the user should define what their data set looks like.
The matrix may represent a directed or undirected network (if it is undirected the matrix must be symmetrical!).
This results in data appearing in the Edges worksheet of NodeXL:
2015-NodeXL-Matrix Edges
This can then be visualized as a network where the edge weights are used to set the thickness of the lines connecting two nodes:
2015-NodeXL-Matrix Data Visualization
Posted in 2015, All posts, NodeXL, SMRF, SNA, Social Media Research Foundation, Social network, Social Network Analysis, Sociology, Visualization Tagged 2015, Edge, How to, HowTo, Import, Matrix, network, NodeXL, SNA, Weight 2 Comments

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