RA Matlab Ch 3

EGR 1302 RA – Ch 3 (5 th Ed.) Chapter 3 Reading Assignment Instructions Read Chapter 3 of MATLAB – An Introduction with Applications by Gilat, and find the answers to the following questions. Write down the answers to each question on this handout. There will be a reading quiz over Chapter 3 on Canvas. You may use this assignment to help you. Introduction 1. What are the two ways that MATLAB performs multiplication, division, and exponentiation? Section 3.1 2. How is the sum of two arrays obtained? 3. What happens when a scalar is added to an array? Section 3.2 4. In order for the operation A*B to be carried out, what must be true? 5. What is another name for the result of the multiplication of a row vector by a column vector? 1

EGR 1302 RA – Ch 3 (5 th Ed.) 6. Rewrite the following set of linear equations into the standard A x = d format. A 11 x 1 + A 12 x 2 + A 13 x 3 = d 1 A 21 x 1 + A 22 x 2 + A 23 x 3 = d 2 A 31 x 1 + A 32 x 2 + A 33 x 3 = d 3 Section 3.3 7. In order for the matrix B to be the inverse of matrix A, what must be true? 8. What is the equivalent of the expression X = A\B? Section 3.4 9. What is the difference between operators for multiplication, division, exponentiation and the element-by-element operators? 10. Element-by-element operations can be done only with ___________________________. Section 3.5 11. How is the operation that is defined by a built-in math function executed when the argument is an array? Section 3.6 12. If A is a vector, what does mean(A) return? 13. If A is a matrix, what does min(A) return? 2