statistics - R question. Create new data set that meets all of 4 conditions -

I would like to create a new dataset where the following four conditions are all found

  rowSums (is .na (UNCA [, 11: 23])) & lt; 12 rowSums (is.na (UNCA [, 27: 39])) & lt; 12 rowSums (is Na (UNCA [, 40: 52])) & lt; 12 rowSums (is.na (UNCA [, 53: 65])) <12>  

Thanks!

then use and operator:

  UNCA new & lt; - UNCA [rowSums (is.na (UNCA [, 11: 23])) & lt; 12 & amp; nbsp; Rows (is.na (UNCA [, 27: 39])) & lt; 12 & amp; nbsp; Rows (is.na (UNCA [, 40: 52])) & lt; 12 & amp; nbsp; Rows (is.na (UNCA [, 53: 65])) & lt; 12,]  

A single & amp; is a vectorized function, whereas a double & amp; Amp; is unary (usually a if statement, for example)