[R] Adding elements in an array where I have missing data.

From: John Kane <jrkrideau_at_yahoo.ca>
Date: Tue 02 May 2006 - 03:26:17 EST


This is a simple question but I cannot seem to find the answer.
I have two vectors but with missing data and I want to add them together with
the NA's being ignored.

Clearly I need to get the NA ignored. na.action?

I have done some searching and cannot get na.action to help.
This must be a common enough issue that the answer is staring me in the face
but I just don't see it.

Simple example
a <- c(2, NA, 3)
b <- c(3,4, 5)

What I want is
c <- a + b where
c is ( 5 , 4 ,8)

However I get
c is (5,NA, 8)

What am I missing? Or do I somehow need to recode the NA's as missing?

Thanks



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