Hi Cheng,
Thank you very much for your prompt reply. I tried "export expression value" before. The file only has conditions in the first row, but no expression levels are output. I guess it may because I did not give a gene information file. I made a gene information file and run my microarray again. It gives me following errors
(1) "Not a CDF file or not in a txt format". Do I need to convert the CDF file into a txt file? I attempt to do so and tried to open the CDF file in notepad and wordpad. It gave me crazy symbols. The CDF file that I am using is attached.
(2) "Cannot file Affymetrix analysis call file 'F:\.....\....\...txt'
No matching TXT file; calculating Presence calls.."
Thank you very much.
Wendy