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Home
Learn NetLogo
What is NetLogo? Tutorial #0 Sample Model Tutorial #1 Models Tutorial #2 Commands Tutorial #3 Procedures
Documentation
NetLogo Dictionary Interface Guide Interface Tab Guide Info Tab Guide Code Tab Guide Programming Guide Transition Guide Preferences Guide Version History
Advanced Tools
Extension Manager Shapes Editor BehaviorSpace System Dynamics HubNet HubNet Authoring Logging Controlling Mathematica Link NetLogo 3D Cluster Computing (HPC)
Extensions
Extensions Guide Arduino Array Bitmap CSV GIS GoGo LevelSpace Matrix Networks Palette Profiler Python Resource Rnd Sound Simple R Table Time Vid View2.5D
FAQ
primitive: nw:load-matrix
Networks Extension Dictionary
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nw:load-matrix

nw:load-matrix file-name turtle-breed link-breed optional-command-block

Generates a new network according to the connection matrix saved in file-name, using turtle-breed and link-breed to create the new turtles and links.

At the moment, nw:load-matrix does not support link weights.

Please be aware that the breeds used to load the matrix may be different from those that you used when you saved it.

For example:

extensions [ nw ]
directed-link-breed
[ dirlinks dirlink ]
to
go
clear-all
crt 5 [ create-dirlinks-to other turtles ]
nw:set-context turtles dirlinks
nw:save-matrix "matrix.txt"
clear-all
nw:load-matrix "matrix.txt" turtles links
layout-circle turtles 10
end

…will give you back undirected links, even if you saved directed links into the matrix.

If you specify an optional-command-block, it is executed for each turtle in the newly created network. For example:

nw:load-matrix "matrix.txt" turtles links [ set color red ]

Take me to the full Networks Extension Dictionary.

Networks Extension Dictionary: load-graphml

Documentation for the load-graphml primitive.

Networks Extension Dictionary: louvain-communities

Documentation for the louvain-communities primitive.


NetLogo is a programmable modeling environment for simulating natural and social phenomena. It was authored by Uri Wilensky in 1999 and has been in continuous development ever since at the Center for Connected Learning and Computer-Based Modeling.

Related Links
  • NetLogo Home
  • CCL Home
  • NetLogo Web
  • NetTango Web
  • NetLogo 3D
  • BehaviorSearch
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Copyright © 1999-2025 Uri Wilensky and the Center for Connected Learning and Computer-Based Modeling at Northwestern University . All rights reserved.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License , or (at your option) any later version.

Commercial licenses are also available. To inquire about commercial licenses, please contact Uri Wilensky at netlogo-commercial-admin@ccl.northwestern.edu .

For more information, visit the NetLogo website .