Ok. i m very new to R.I have been trying to make small data set with N2Age, N3Sex, sources_Metric, hygieneSanitation_Metric, attitudeWASH_Metric with 20 rows from the data set QNR. but i have failed, it gives me Error in [.data.frame(QNR, , c(1, 2, 69, 70, 71), ) :
undefined columns selected.