Parameters | Expression Parameters | Baseline Quantification

Baseline Quantification
Use this parameter to specify the statistics for quantifying the baseline across columns in the Input SAS Data Set (or the specified Baseline Reference SAS Data Set ) for measurements with the same rank.
Statistics for quantifying the baseline are described in the table below:
Constructs the baseline using the median across all of the data columns.
This option should be selected for count data 1 .

Bullard, JH., E. Purdom, KD Hansen, and S. Dudoit. 2010. Evaluation of statistical methods for normalization and differential expression in mRNA-Seq experiments. BMC Bioinformatics 11:9.