loops - repeat operation to different data set in R language -

i have data set have 5 columns (column, 0 4) named data1. add column 2, 3 , normalize result of data1. following :

final_data = my_norm_function(data1[2]+data1[3]) write.table(final_data) 

but want same operation other data set, data2, data3, data4, etc -- 2 columns out each data set , add them together, normalize result , save. there loop can use this? saved data set corresponding data1, data2, data3.

sure, here's for loop version:

for(i in c("vector of file names")){    datain<-read.table(i)    final_data = my_norm_function(datain[2]+datain[3])    write.table(final_data,file=paste("final_data",i)) }