search for: answer_1

Dear all The following is a very basic and beginner's question on loops. Suppose you have data (say, 1000 cases) with two variables named "answer" (string) and "class" (numeric). The latter runs from 1 to 78 and categorizes the data. I need to create a file "answer_1.txt" for the cases with class==1, and so on, up to "answer_78.txt" I have been able to do this for one value of "class" in the following way k_1<-answer[class==1] write.table(k_1, "answer_1.txt") Now, I would like to loop over "class", replacin...