The data files must be in the dChip tabular file format.
Despite the fact that these files typically have an "XLS" file extension, they are in fact ordinary text files.
One or two files are processed into a single dataset. For Affy chips that are broken across two files, such as HU133A/B use the DCHIP paired xls files template and select both files in the pair. For unpaired files use the DCHIP single xls file template.
Gene identifier information is retrieved from the first column of the first file and is stored as an Affy Identifier.
For paired chips, samples are ordered according to their order in the first file. Samples that are present in one file but not the other will have missing values for the file they are missing from.
Selecting a Template for Data Import
Importing Multiple Files With One Sample Each