Exclude missing values on only 1 variable

On Jul 5, 2012, at 1:25 PM, Eiko Fried wrote:

Hello,

I have many hundred variables in my longitudinal dataset and lots of
missings. In order to plot data I need to remove missings.

If I do

data <- na.omit(data)

that will reduce my dataset to 2% of its original size ;)

So I only need to listwise delete missings on 3 variables (the ones  
I am
plotting).

data$variable1 <-na.omit(data$variable1)

?complete.cases  # returns a logical vector

data[ complete.cases( data[ , c("var1", "var2", "var3"]) , ]

data[ complete.cases( data[ , c("var1", "var2", "var3") ] ) , ]