|transformList| is what you are looking for: |tl <- transformList(c("FL1-H","FL2-H"), log) colnames(tl) data(GvHD) transform(GvHD[[1]], tl)| Mike Jiang On 11/19/2013 01:00 PM, Liu, Hongye wrote: > Dear Dr. Jiang, > > How are you? I am a new user of flowCore and I have run into a problem > which I hope you can help me. > I wanted to iterate through the parameters (character strings) when I > use the transform() function on the flow frame data, but I found I can > only > input backtick-ed parameter names into the function. For example, I > can't do transform( ,"FL1-H" = log("FL1-H"), ); > Do you know a way to deal with it? Thank you very much for your help! > > Best, > > Hongye > > > Hongye Liu, PhD Research Associate > Laboratory of Systems Pharmacology, > Dept. of Systems Biology. > Harvard Medical School > Armenise I #523, > Office # 617-432-6081 > Email: Hongye_Liu@hms.harvard.edu <mailto:hongye_liu@hms.harvard.edu> [[alternative HTML version deleted]]