Python and Vicon Nexus 2.x SDK

[Gerome Vivar]

Hello everyone,

I am new here. My name is Gerome. I would like to ask if there is anyone here who is familiar with the python SDK of the latest Vicon Nexus software (2.x)?

I am working on a kinematic analysis of a walking gait study involving random perturbations. I would like to do the following:

1. I would like to know if it is possible to locate the frame where these pertubations happen?
2. Export all the gaps to .xsl/.txt/.csv format?

Thank you very much for taking the time to read this. I look forward to all your suggestions.

Kind regards,
Gerome

[Lasse Roren]

Re: Python and Vicon Nexus 2.x SDK

Hello everyone,

I am new here. My name is Gerome. I would like to ask if there is anyone here who is familiar with the python SDK of the latest Vicon Nexus software (2.x)?

I am working on a kinematic analysis of a walking gait study involving random perturbations. I would like to do the following:

1. I would like to know if it is possible to locate the frame where these pertubations happen?
2. Export all the gaps to .xsl/.txt/.csv format?

Thank you very much for taking the time to read this. I look forward to all your suggestions.

Kind regards,
Gerome

Hi Gerome,

I've worked with the Nexus 2.x Python/MatLab SDK, and I think you'll find that it'll do the job nicely. The SDK has functions that allow you to access all the data from the trial. If you can detect when perturbations happen based on the actual motion captured data, for example by looking for a certain pattern in the trajectories, you can implement this in Python by calling the Nexus SDK function GetTrajectory() which returns an array of all XYZ values for a particular marker's trajectory. The SDK also has functions to write data back to Nexus, so depending on exactly how you wish to do you analysis you could either do this and then export from Nexus, or you could export your results directly from Python.

Hope this helps!

[Gerome Vivar]

Re: Python and Vicon Nexus 2.x SDK

Hi Gerome,

I've worked with the Nexus 2.x Python/MatLab SDK, and I think you'll find that it'll do the job nicely. The SDK has functions that allow you to access all the data from the trial. If you can detect when perturbations happen based on the actual motion captured data, for example by looking for a certain pattern in the trajectories, you can implement this in Python by calling the Nexus SDK function GetTrajectory() which returns an array of all XYZ values for a particular marker's trajectory. The SDK also has functions to write data back to Nexus, so depending on exactly how you wish to do you analysis you could either do this and then export from Nexus, or you could export your results directly from Python.

Hope this helps!

Hi Lasse,

Thank you for taking the time to answer this question. I already found what I was looking for. But this still helps, thanks!

Gerome