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I have a dataframe concerning manner of death from death certificates, from 2005 to 2009 inclusive, with the following structure: > str(MannerYoung.plot.data) 'data.frame': 245 obs. of 4 variables: $ year : Factor w/ 5 levels "2005","2006",..: 1 2 3 4 5 1 2 3 4 5 ... $ manner : Factor w/ 7 levels "Accident","Homicide",..: 1 1 1

Hello R Help List, I am an R novice and trying to use the ifelse function to create a new binary variable based off of the responses of two other binary variables; NAs are involved. I pulled it off almost successfully, but when I checked the counts of my new variable for accuracy, I found that a small portion of the NA cases were not being passed through as NAs, but as "0" counts in my