Additional Nexus reference PDFs:

Nexus legacy documentation:

This information is for Vicon Nexus 2.5. For up-to-date help, see the latest Nexus documentation.

Nexus PDFs

Nexus 2 offers the following options for modeling:

  • Plug-in Gait (and the Oxford Foot Model). If you are new to modeling with Nexus, this provides a good introduction: the Plug-in Gait model is supplied with Nexus and all the operations necessary to run the model are easily accessible and ready to use. For more information, see Modeling with Plug-in Gait in the Vicon Nexus User Guide.
  • MATLAB. If you are familiar with MATLAB, you can use the supplied examples to create your own custom model. See Modeling with MATLAB.
  • Python. If you are familiar with Python, you can use the supplied examples to create your own custom models. See Modeling with Python.


 For research and experimental purposes, a version of Plug-in Gait in open MATLAB script is available. For further details, contact Vicon Support.

About modeling terminology

For a clear understanding of the way modeling is represented in Nexus, bear in mind the following definitions:

  • Labeling Any process, operation or algorithm that is used in Vicon Nexus to assign a label to a reconstruction
  • Modeling Takes labeled reconstructions and uses these to perform calculations whose results are new variables.
  • Models Files or operations that produce new calculations after labeling. Plug-in Gait and the Oxford Foot Model are models, as are MOD files built in BodyBuilder.
  • Subject The representation in Nexus of a physical entity (eg a patient)
  • Labeling skeleton template (VST): Contains information and definitions related to labeling.
  • Labeling skeleton (VSK) A subject that has a labeling skeleton template attached to it and subject-specific properties that are required for modeling (after labeling)

The following examples show the distinction between labeling and modeling:

  • Labeling VSTs/VSKs, labeling skeleton calibration (labeling calibration)
  • Modeling PlugInGait.MOD, scripts in Bodybuilder, PECS, MATLAB calculations