Hi everyone, I have a question about sampling. I have a data set which includes 25 different variables named; symptom1, symptom2,.....,symptom25(25 columns).Each variable(symptom) has 9 patients (9 columns). I need to use random sampling to make, 5 different samples from my data. i.e. using all 25 variables I need to make 10 different samples by changing the rows(patients) and then I need to show each sample with their mean for each variable(symptom) which is just adding a row at the end of each symptom to show the mean. I used this code: for(i in 1:5) {temp[i]<-sample(Mydata,5, replace=F)} show(temp) -- View this message in context: http://www.nabble.com/Question%3A-how-to-make-a-sample-from-my-data-set-tp19974192p19974192.html Sent from the R help mailing list archive at Nabble.com.