User Parameters
User parameters are names for variables that you can control.
Parameters can be used as adjustable values
in calculated columns and
fields that would otherwise use a fixed value.
For example, the position data gathered from a Motion Detector can be
used
to find both gravitational and spring potential energy (mgh and
0.5kx2). The goal is to plot total energy of mass on a
spring in
harmonic motion. The velocity data are used to find kinetic energy from
0.5mv2.
Rather than hard coding k and m as numbers, they
can be user
parameters in the calculated columns.
After plotting these columns, and inserting a parameter control from
the Insert menu, you can see the effect of changing the values for k
and m easily.
Another example is controlling the trigger level with a parameter, and
being able to adjust it while Logger Pro is waiting to take data.
Also, the analog out frequency can be
controlled on the fly using a parameter and a control.
Note: Created parameters only apply
to individual files. They will be saved when your file is saved.
How to Create a User Parameter
1. Select User Parameters from the Data menu. The following
dialog will appear:

2. Click the Add button. A new field will appear.

3. Assign the new parameter a name, value, units, and decimal places.
Checking the Editable box allows you to edit the user
parameters, as dictated by the increments you set, in the Parameter
Control
object.
4. Click OK.
Tip: User parameters can be
added from the Data menu, the Parameters Options dialog, or the
calculated column dialog.