For loop: replacement has one row more than data

Question

I am an beginner in R and have a problem. Any help would really be appreciated! When I apply the for loop in the following (simplified) case, I get an error message saying "replacement has 5 rows, data has 4" ``` Country <- c("Germany", "France", "Italy", "Spain") Unemploy <- c(2, 3, 4, 10) Growth <- c(2, 7, 6, 9) data <- data.frame(Country, Unemploy, Growth) for (i in data$Country) { if (identical(data$Country[i], "France")) { data$Growth[i] <- "5" } else { data$Growth[i] <- "2" } } ``` Following message given out: ``` Error in `$<-.data.frame`(`*tmp*`, "Growth", value = c("2", "2", "2", : replacement has 5 rows, data has 4 ```

Accepted Answer

Use `ifelse` instead

```
data[ ,"Growth"] <- ifelse(data[ , "Country"] == "France", "5", "2")
```

For loop: replacement has one row more than data

Solution

Problem