Hello.

I have a two statement logical that if NA is returned for the second
statement I want to rely on result of the first statement.  I still would
like to use both when I can though.

x <- c(1:5)
y <- c(1,2,NA,4,5)
x < 5 & x-y == 0

How can I trick R to refer back to (x < 5) where it is NA on the third
value?

Thanks.

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