R Cookbook

1. Inserting Data into a Vector
   
2. 
   
3. Problem
   
4. You want to insert one or more data items into a vector.
   
5. 
   
6. Solution
   
7. Despite its name, the append function inserts data into a vector by using the after parameter, which gives the insertion point for the new item or items:
   
8. 
   
9. > append(vec, newvalues, after=n)
   
10. Discussion
    
11. The new items will be inserted at the position given by after. This example inserts 99 into the middle of a sequence:
    
12. 
    
13. > append(1:10, 99, after=5)
    
14. [1]  1  2  3  4  5 99  6  7  8  9 10
    
15. The special value of after=0 means insert the new items at the head of the vector:
    
16. 
    
17. > append(1:10, 99, after=0)
    
18. [1] 99  1  2  3  4  5  6  7  8  9 10

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