Introduction

This is a collection of tools that are helpful for gait analysis. Some are specific to the needs of the Human Motion and Control Lab at Cleveland State University but other portions may have potential for general use. It is relatively modular so you can use what you want. It is primarily structured as a Python distribution but the Octave files are also accessible independently.

Python Packages

The main Python package is gaitanalysis and it contains five modules listed below. oct2py is used to call Octave routines in the Python code where needed.

gait.py

General tools for working with gait data such as gait landmark identification and 2D inverse dynamics. The main class is GaitData.

controlid.py

Tools for identifying control mechanisms in human locomotion.

markers.py

Routines for processing marker data.

motek.py

Tools for processing and cleaning data from Motek Medical's products, e.g. the D-Flow software outputs.

utils.py

Helper functions for the other modules.

Each module has a corresponding test module in gaitanalysis/tests sub-package which contain unit tests for the classes and functions in the respective module.

Octave Libraries

Several Octave routines are included in the gaitanalysis/octave directory.

2d_inverse_dynamics

Implements joint angle and moment computations of a 2D lower body human.

inertial_compensation

Compensates force plate forces and moments for inertial effects and re-expresses the forces and moments in the camera reference frame.

mmat

Fast matrix multiplication.

soder

Computes the rigid body orientation and location of a group of markers.

time_delay

Deals with the analog signal time delays.

Installation

You will need Python 2.7 or 3.7+ and setuptools to install the packages. Its best to install the dependencies first (NumPy, SciPy, matplotlib, Pandas, PyTables).

Supported versions:

• python >= 2.7 or >= 3.7
• numpy >= 1.8.2
• scipy >= 0.13.3
• matplotlib >= 1.3.1
• tables >= 3.1.1
• pandas >= 0.13.1, <= 0.24.0
• pyyaml >= 3.10
• DynamicistToolKit >= 0.4.0
• oct2py >= 2.4.2
• octave >= 3.8.1

We recommend installing Anaconda for users in our lab to get all of the dependencies.

We also utilize Octave code, so an install of Octave with is also required. See http://octave.sourceforge.net/index.html for installation instructions.

You can install using pip (or easy_install). Pip will theoretically [1] get the dependencies for you (or at least check if you have them):

$ pip install https://github.com/csu-hmc/GaitAnalysisToolKit/zipball/master

Or download the source with your preferred method and install manually.

Using Git:

$ git clone [email protected]:csu-hmc/GaitAnalysisToolKit.git
$ cd GaitAnalysisToolKit

Or wget:

$ wget https://github.com/csu-hmc/GaitAnalysisToolKit/archive/master.zip
$ unzip master.zip
$ cd GaitAnalysisToolKit-master

Then for basic installation:

$ python setup.py install

Or install for development purposes:

$ python setup.py develop

[1]	You will need all build dependencies and also note that matplotlib doesn't play nice with pip.

Dependencies

It is recommended to install the software dependencies as follows:

Octave can be installed from your package manager or from a downloadable binary, for example on Debian based Linux:

$ sudo apt-get install octave

For oct2py to work, calling Octave from the command line should work after Octave is installed. For example,

$ octave
GNU Octave, version 3.8.1
Copyright (C) 2014 John W. Eaton and others.
This is free software; see the source code for copying conditions.
There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  For details, type 'warranty'.

Octave was configured for "x86_64-pc-linux-gnu".

Additional information about Octave is available at http://www.octave.org.

Please contribute if you find this software useful.
For more information, visit http://www.octave.org/get-involved.html

Read http://www.octave.org/bugs.html to learn how to submit bug reports.
For information about changes from previous versions, type 'news'.

octave:1>

The core dependencies can be installed with conda in a conda environment:

$ conda create -n gait python=2.7 pip numpy scipy matplotlib pytables pandas pyyaml nose sphinx numpydoc oct2py mock
$ source activate gait

And the dependencies which do not have conda packages can be installed into the environment with pip:

(gait)$ pip install DynamicistToolKit

Tests

When in the repository directory, run the tests with nose:

$ nosetests

Vagrant

A vagrant file and provisioning script are included to test the code on both a Ubuntu 12.04 and Ubuntu 13.10 box. To load the box and run the tests simply type:

$ cd vagrant
$ vagrant up

See VagrantFile and the *bootstrap.sh files to see what's going on.

Documentation

The documentation is hosted at ReadTheDocs:

http://gait-analysis-toolkit.readthedocs.org

You can build the documentation (currently sparse) if you have Sphinx and numpydoc:

$ cd docs
$ make html
$ firefox _build/html/index.html

Release Notes

0.2.0

• Support Python 3. [PR #149]
• Minimum dependencies bumped to Ubuntu 14.04 LTS versions and tests run on latest conda forge packages as of 2018/08/30. [PR #140]
• The minimum version of the required dependency, DynamicistToolKit, was bumped to 0.4.0. [PR #134]
• Reworked the DFlowData class so that interpolation and resampling is based on the FrameNumber column in the mocap data instead of the unreliable TimeStamp column. [PR #135]
• Added note and setup.py check about higher oct2py versions required for Windows.

0.1.2

• Fixed bug preventing GaitData.plot_grf_landmarks from working.
• Removed inverse_data.mat from the source distribution.

0.1.1

• Fixed installation issue where the octave and data files were not included in the installation directory.

0.1.0

• Initial release
• Copied the walk module from DynamicistToolKit @ eecaebd31940179fe25e99a68c91b75d8b8f191f