Identifying rows in data.frame with only NA values in R

Question

I have a data.frame with 15,000 observations of 34 ordinal and NA variables. I am performing clustering for a market segmentation study and need the ro

Answer 1

Using the Store2 sample data posted in the answer provided by @akrun

which(apply(Store2, 1, function(x) all(is.na(x))))
#3 4 
#3 4 

Or, similar to akrun's answer:

which(rowSums(!is.na(Store2))==0)
#3 4 
#3 4