R coding (4.6 from Introduction to Scientific Programming and Simulation Using R)

Here are the first few lines of two files

ID Age

1 18

2 19

3 17 ....

ID Num Teeth

1 28

2 27

3 32

Write a program in R to read each file then write an amalgamated list of the following form:

ID Age Num Teeth

1 18 28

2 19 27

3 17 32

The function should read in two file names as strings and output a table. The ID (first column) should match between the data set. Produce an NA when a subject appears in one data set and not in the other.

function(file1, file 2)

{

}