Numerical Analysis Subject help1

6/1/2019 Week 6: Assignment

https://igu.instructure.com/courses/854/assignments/4720 1/1

Week 6: Assignment

Due May 14 by 11:59pm Points 100 Submitting a text entry box Available until Jun 2 at 11:59pm

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IT 205: Numerical Analysis

1. What is the difference between an array, a matrix, and a vector?

2. Answer the following questions for the array shown here.

a) What is the size of c?

(b) What is the value of c(2,3)?

(c) List the subscripts of all elements containing the value 0.6.

3. Determine the size of the following arrays. Check your answers by entering the arrays into MATLAB and using the whos command or the Workspace Browser. Note that the later arrays may depend on the definitions of arrays defined earlier in this exercise.

(a) u = [10 20*i 10+20];

(b) v = [-1; 20; 3];

(c) w = [1 0 -9; 2 -2 0; 1 2 3];

(d) x = [u' v];

(e) y(3,3) = -7;

(f) z = [zeros(4,1) ones(4,1) zeros(1,4)'];

(g) v(4) = x(2,1);

4. What is the value of w(2,1) in the w array calculated in part (c)?

5. What is the value of x(2,1) in the x array calculated in part (d)?

6. What is the value of y(2,1) in the y array calculated in part (e)?

7. What is the value of v(3) after statement (g) is executed?