R for loop returns NULL instead of expected values

Question

i<-c(1:44)
diff_arbeitnehmer <- for(x in i){if(x == 44) {diff_arbeitnehmer[x] <- 0} else{diff_arbeitnehmer[x] <- 100/erwerbstaetige[x,2]*erwerbstaetige[x,4]-100/erwerbstaetige[x+1,2]*erwerbstaetige[x+1,4]}}

My data frame has 44 entriess

I am using R script could someone tell me what could be the reason?

I am lost with this

Answer 1

I can't run your code because I don't have your data frame, but maybe the reason is because you are trying to assing a for loop into the variable diff_arbeitnehmer . I did this change and hope that know it works:

i<-c(1:44)
diff_arbeitnehmer <- c()
for(x in i){
  if(x == 44){
    diff_arbeitnehmer[x] <- 0
  } else{
      diff_arbeitnehmer[x] <- 100/erwerbstaetige[x,2]*erwerbstaetige[x,4]-100/erwerbstaetige[x+1,2]*erwerbstaetige[x+1,4]
  }
}

An advice is to take a look if the assignment in the last condition is right, maybe you need to put some parenthesis.