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

I used the @Sergio Mora answer to adapt and solve the question. I saw today the question and I needed a solution.

insert_row <- function(index, new_row, dat){
  if(is.matrix(dat) && ncol(dat) > 1){
    long <- NROW(dat)
    if(index == 1){
      new_data <- rbind(new_row, dat)  
    }
    else if(index == long){
      new_data <- rbind(dat, new_row)
    }
    else{
      new_data <- rbind(dat[1 : (index - 1), ], new_row, dat[index : long, ])
    }
    row.names(new_data) <- NULL
  }
  else if(ncol(dat) == 1 || is.vector(dat)){
    long <- length(dat)
    if(index == 1){
      new_data <- c(new_row, dat)  
    }
    else if(index == long){
      new_data <- c(dat, new_row)
    }
    else{
      new_data <- c(dat[1 : (index - 1)], new_row, dat[index : long])
    }
    row.names(new_data) <- NULL
  }
  return(new_data)
}