Error in R equivalence comparison: missing value where TRUE/FALSE needed

Asked Nov 13 '13 at 14:23

Active Jan 19 '14 at 10:30

Viewed 50 times

I'm having troube with an error in my script.

I have a data frame with the death_year column (with values between 2000 and 2013) and I want to fill the cell of another column (year_X - being X a value between 2000 and 2013) with the value of 1 if the death_year == year_X.

The outut would be something like this:

death_year  year_2000 year_2001 year_2002
[1]  2000           1        0         0
[2]  2002           0        0         1
[3]  2009           0        0         0

That's my script:

a<-vector("numeric")

for(i in data$death_year){
  for(j in 2000:2013){
    if(i == j){
      for(c in 1:length(data)){
          data[c,paste( 'year', j, sep="" )]==1
    }
  }
}

Error in if (i == j) { : missing value where TRUE/FALSE needed

Can somebody help me?

edited Jan 19 '14 at 10:30

asked Nov 13 '13 at 14:23

JMarcelino

Type `data$death_year` in your console. What do you get as output? – Ricardo Saporta Nov 13 '13 at 14:45
I get a vector with years and NAs – JMarcelino Nov 13 '13 at 14:56
1

The NA's are your issue. You cannot use `==` on NA's – Ricardo Saporta Nov 13 '13 at 15:25
Thank you, that was the problem indeed – JMarcelino Nov 13 '13 at 15:43
np. Incidentally, notice that it was the same answer as given by @BrianDiggs in the question linked here ;) – Ricardo Saporta Nov 13 '13 at 15:49

Error in R equivalence comparison: missing value where TRUE/FALSE needed

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