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2012 Jul 23
3
How to do the same thing for all levels of a column?
...due at position 1: # showing levels of the 3rd column, which means the types of residues >myfile[,3] # calculating the ratio of L >list=c(which(myfile[,3]=="L")) >time0total=sum(myfile[,2]) >AA_L=0 >for (i in 1:length(list)){AA_L=sum(myfile[list[[i]],2]+AA_L)} >ratio_L=AA_L/time0total So how can I write a script to do the same thing for the other two levels (T and R) in column 3, and also do this for every column that contains amino acid residues? Many thanks for any help you could give me on this topic! :) Regards, Zhao -- Zhao JIN Ph.D. Candidate Rut...