Hi,
How about this:
myData = data.frame(x = sample(c(NA, 1:5), 50, replace = T),
y = sample(c(NA, 1:5), 50, replace = T),
z = sample(c(NA, 1:5), 50, replace = T))
#Ignore row when NA in column 1 or 2
myData[complete.cases(myData[,1:2]),][1:20,1:2]
#Ignore row when NA in any column
myData[complete.cases(myData),][1:20,1:2]
PJ