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.