Note: If you are using Excel to edit GenePattern files, be sure to save the file as a tab-delimited text file and supply the correct file extension. You can specify the file name in quotes to prevent Excel from appending .txt to the file name. Also, note that Excel's auto-formatting can introduce errors in gene names, as described in Zeeberg, et al (2004).
POL File Format
The POL file format represents a Parameter-Ordered List. This format is a tab-delimited file with 4 columns, consisting of the following:
A ranking (an integer corresponding to the rank of the feature)
Unique feature identifier
Distance metric (value upon which the rank position is based)
If you don't have a distance metric, you can use the rank in column 4 as well. Lines from a sample pol file are shown below: