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Exploring Matrices for Data Visualization: Techniques and Practical Application

Learn how to utilize matrices for displaying data in charts effectively. Understand matrix vocabulary, including dimension, entry, and address. Practice writing the location and dimensions of matrices. Apply knowledge by writing data in matrix form and performing matrix addition and subtraction. Enhance your mathematical skills with real-world examples.

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Exploring Matrices for Data Visualization: Techniques and Practical Application

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  1. Matrices Guiding Question: How can we use matrices to display data for charts?

  2. Matrix Vocabulary • Dimension: written as m x n. m is the number of rows and n is the number of columns. • Example: there are 2 rows and 3 columns so the dimensions of the matrix would be written as 2X3 Entry: each value in a matrix ex: 2, 4, 7, 5, 6, 8

  3. Matrix Vocabulary Continued • Address: the location of an entry in a matrix. This is expressed by using the lowercase matrix letter with the row and column number as subscripts. • Example: =A • Matrix A • The number 6 is located at row 2 and column 2 in matrix A, therefor, it is written as a22

  4. How can we write the location of a number in a matrix? • M= • What are the dimensions of M? • What is the entry of m32? • The entry 0 appears at what two addresses?

  5. Using data to write a Matrix Use the package data above for the costs of the packages given. Display the data in matrix form. What are the dimensions of C? What is the entry at c12 4. What is the address of the entry .005?

  6. Adding and Subtracting Matrices • To add or subtract two matrices, add or subtract the corresponding entries. You may add or subtract two matrices ONLY if they have the SAME dimensions:

  7. Page 251, 18 and 20

  8. Page 250: 2-16 even

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