The data files must be in Affymetrix MAS 5.0 tabular file format.
In MAS 5, the data should be exported from the Pivot Tab in tab delimited .txt format. Ensure that the exported files all contain the Signal and Detection p-value columns.
Multiple files are processed into a single dataset. The sample order of the imported dataset is determined by the order of the source sample data files listed in the Import Data dialog.
The file headers are discarded.
Gene identifier information is retrieved from the first column of the first file and is stored as an Affymetrix Identifier.
Gene expression data is retrieved from the Signal column and the reliability measure is retrieved from the Detection p-value column of each file in the order they are placed in the Import Data dialog.
Selecting a Template for Data Import
Importing Multiple Files With One Sample Each