User guide

Charnwood Dynamics Ltd. Coda cx1 User Guide – Coda Basics I - 2
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The Setup
What is the Setup?
The setup is the set of options which tell the Codamotion Analysis application how you
want data to be displayed, including the set of names assigned to markers and other data
channels. The current setup options apply to all data files which are open. You can
create a standard setup which you can save to a named disk file. Once you have created
a standard setup, you needn’t worry about setup options, you can just load the setup, and
everything will be configured for you. You may be happy with the options in one of the
sample setup files provided with the application: GAIT.STP, and EMG.STP. It is likely that
you will want a separate setup for different research projects. You will need separate
setups for different marker configurations.
If, as advised, you keep all the data files for different research projects in different
directories, then it is sensible to store the appropriate setup files in the same directory.
The first part of the setup simplifies life for you by assigning names to marker, EMG, force,
and force vector channels. This assignment makes other parts of the setup process
easier. For example, if you always place Marker 1 on the ankle, then you can define
Marker 1 as “Ankle”. So when you are creating graphs, for instance, instead of having to
remember which marker is placed on the ankle, you can simply use the name “Ankle” and
the program will know what it means. The same applies to EMG channels. Typically,
customised name assignments for force data are unnecessary, as there is only one force
plate, but you are free to re-assign this if you wish.
Once marker names have been assigned, you can create a stick figure joining diagram.
This defines which markers are connected to which on the real-time and post-acquisition
2D stick figure views.
Another set of options is the definitions of joint angles. This allows you to specify the
markers which are used to define any joint rotation angle. If force data is available, joint
moments and powers can also be calculated. These calculated sets of data can then be
displayed on graphs.
An advanced setup option is the creation of variables, see Variables Overview.
You can create graphs of any data set against time, or against a marker position. Any
graphs which you have configured are also part of the setup. The graphs and their
positions on the screen are saved as part of the setup. At any time you can revert to the
positions of the graphs which were saved with the setup which is currently loaded.
When you start a Codamotion Analysis session, the setup is automatically restored to the
state it was in when you finished your previous session, even if you did not save it as a
setup file. If you are using Codamotion Analysis for the very first time on your computer,
then a default setup is used. You can load a setup at any time with the Load Setup
command in the Setup menu. If you load a setup when a data file is open, then any graph
views which are currently open for that data file will be removed, and new ones will be
created if they are configured in the new setup.
The name of the last-loaded Setup file is displayed at the end of the Codamotion Analysis
title bar. If a Setup file has not been loaded, then “[-]” is displayed.