R_exercise_2.md

R exercise 2

1. Assign the value of 3 to the variable x.
2. Assign the value 25 to the variable y.
3. Assign the value of x to the variable y.
4. Before printing it out, think about what the current values of x and y.
5. What are the values of x and y (check).
6. Now assign assign x a new value of 10.
7. Has the value of y changed? Why or why not?
8. Check the value of y.
9. What is 345²?
10. What is the square root of 1250?
11. Make a numeric vector a of the following numbers: 3 9 12 17 -3
12. Make another vector b of the following numbers: 1 2 3 4 -5
13. Make a new vector c that concatenates a and b.
14. How would you do element by element addition of a and b?
15. How about element by element division?
16. What is the length of a, of b and of c?
17. Check to see if a and b are equal.
18. Make a vector b3 that is the vector b repeated three times in a row.
19. Use the identical() function to check to see if all elements of a equal a and if a equals b.