Parameters | Expression Parameters | Design-Level Grouping Variables

Design-Level Grouping Variables
Use this field to specify the variables used to group arrays (or channels) for calculating the median . Leave this field blank to calculate the median across all arrays.
To Specify One or More Design-Level Grouping Variables:
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All of the variables in the EDDS are displayed in the Available Variables field.
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Click to add the highlighted variable(s) to the Design-Level Grouping Variables field.
For example, select Array to calculate the median within each individual array.