Add a new row in specific place in a dataframe

Question

Heres my data:

 > data
  Manufacturers       Models
1   Audi                RS5  
2   BMW                 M3  
3   Cadillac            CTS-V  
4   Lexus           


        

Answer 1

If order is an important feature of your dataset then you should codify it in a safe way, e.g., by using an index variable. I wouldn't rely on rownames or the order of the data.frame rows since there are operations where they are not preserved.

data <- read.table(text="Manufacturers       Models
1   Audi                RS5  
2   BMW                 M3  
3   Cadillac            CTS-V  
4   Lexus               ISF",header=TRUE)

data$ind <- seq_len(nrow(data))
data <- rbind(data,data.frame(Manufacturers = "Benz", Models = "C63",ind=3.1))
data <- data[order(data$ind),]

#   Manufacturers Models ind
# 1          Audi    RS5 1.0
# 2           BMW     M3 2.0
# 3      Cadillac  CTS-V 3.0
# 5          Benz    C63 3.1
# 4         Lexus    ISF 4.0