**MISSION 334**

# Working With Matrices

Learn how to create, index, and manipulate matrices, important data structures in R.

#### Objectives

#### Mission Outline

1. Matrices: Two-Dimensional Data Structures

2. Combining Vectors into Matrices

3. Naming Matrix Rows and Columns

4. Finding Matrix Dimensions

5. Adding Columns to Matrices

6. Indexing Matrices By Element

7. Subsetting Matrices by Rows and Columns

8. Ranking Universites

9. Scoring and Ranking Universities

10. Next Steps

11. Takeaways