
Dear Professor,It seems that I have found the essence of my problem.
When I loaded rawdata(.xys files) into R and preprocessed the rawdata using rma(), it seemed that the data from B73 genome (with the name like GRMZM2G130813_T01)were lost, and I can't  extract  them via grep(). There are  92492  features in database(GEO),whereas only 69557 features in my ExpressionSet. I guess my interest data are inside the losing dataset.Maybe it's the method I used that accounts for this matter, but I don't know the solution. Could you tell me how to solve it?Looking forward to your reply!!Thank you very much!Best RegardsMaggie 		 	   		  
	[[alternative HTML version deleted]]

