Parameters | Expression Parameters | Control Levels

Control Levels
Use this field to specify the level for each of the Variables Defining Analysis Groups (or Variables Defining Control Sets if multiple control sets are being used) to be used as a control.
You must include each level in double quotation marks (“”) and separate the levels by spaces ( ).
If you leave this field blank, the first sorted level for each group variable will be used as the control when using one set of control samples.
Important: This field is required when using multiple control groups or paired control samples.
To Specify the Control Levels:
For example, to specify flies that are 1 week old (identified by the value WK1 in the Age column) as the control level, type “Wk1” in the text box, as shown below: