User guide

Charnwood Dynamics Ltd. Coda cx1 User Guide – Coda Basics I - 2
CX1 USER GUIDE - COMPLETE.doc 26/04/04 56/162
Once you have loaded a setup which contains the types of variables you want to collect,
you can define the set of variables for any data file you analyse. This is done by using
cursors on graphs.
Whilst you are defining the variables, you can view their values in a variables view
window. When all variables have been defined, you can export them to a
spreadsheet/database. See Exporting variables to other windows applications.
Creating and deleting variables
This should be done when you are creating a setup to use for a particular study. The
process of creating variables means that you specify the types of variable you intend to
use in your study. You can assign custom names to variable types. For instance, if one
of the variables required in your study is the maximum and minimum vertical
displacements of the toe, you would need to create a Max/Min Ordinate value type of
variable, and you may give it a name such as Toe Max/Min.
To create a variable:
Choose Edit Variables from the Setup menu.
From the dialogue box which appears, choose New Variable.
From the subsequent dialogue, select the type of variable you want to create from the
list, and type in a meaningful name in the box. See the Setup menu Edit Variables
command for more information on variable creation.
Delete variables from the current setup with caution. Deleting variables should only be
necessary when you are modifying a setup and intend to save it under a new name. If
you delete variables from a setup when you are half way through a project, and then save
the modified setup under its original name, then it will be difficult to export variables to the
same spreadsheet/database as you began with.
To delete a variable:
Choose Edit Variables from the Setup menu.
Select the variable you want to delete from the list of currently created variables.
Choose the Delete Variable button.
Defining variables
This can only be done after you have created variables. Variables can be defined based
upon the positions of the current cursors, or the positions of a selected static bar. Note
that some variable types require another static bar to the right of the selected static bar or
current cursors.
To define a variable:
For variable types which use information from graph plots (and most of them do),
ensure that the correct plot is selected (i.e. if you want to define the angular movement
of the ankle, make sure you haven’t got a plot of the moment about the knee selected).
Either select a static bar or position the current cursors at the points at from which the
variable should be defined. See Working with cursors for more information on
positioning cursors.