Adding dummy rows in a data frame containing NA to increase the row count of a data frame

Question

Here is the code I am using:

for(i in 1:(max_length - nrow(dat2006))){
  datDummy[nrow(datDummy + i), ] <- NA
}

Can someone please suggest a better approach

@akrun: Example

    df <- data.frame("var1" = c(1,2,3))
    df

Original Data Frame

var1
1    1
2    2
3    3

For loop (Indexing is a problem, I wanted to add 5 more rows)

for(i in 1:5){
          df[nrow(df) + i, ] <- NA
          }

Output of For

df
var1
1     1
2     2
3     3
4    NA
5    NA
6    NA
7    NA
8    NA
9    NA
10   NA
11   NA
12   NA
13   NA
14   NA
15   NA
16   NA
17   NA
18   NA

Answer 1

I was able to achieve what I wanted using the following code:

row2007 <- as.integer(max_length - nrow(dat2007))
for(i in row2007){
  dat2007[(nrow(dat2007) + i), ] <- NA
}