Hello i really need help with this please. From Michael T. Heath - Scientific Co

Question

Hello i really need help with this please.

From Michael T. Heath - Scientific Computing/ Chapter 3/ computer problem 3.4

i need to solve this problem using matlab, thankyou

3.4. (a) Solve the following least squares prob- lem using any method you like: 0.16 0.10 0.26 | 0.28 | . 3.31 2 1 | 2.02 1.29 2 (b) Now solve the same least squares problem again, but this time use the slightly perturbed right-hand side 0.271 b 0.25 3.33 (e) Compare your results from parts a and b Can you explain this difference?

Explanation / Answer

a)

xa =

1
1

b)

xb =

7.0089
-8.3957

MATLAB CODE :

clc;

A=[0.16 0.10;0.17 0.11;2.02 1.29];

%-----------------PART a ----------------

ba=[0.26;0.28;3.31];

xa=(inv(A'*A))*(A'*ba);

%-----------------PART b -----------------

bb=[0.27; 0.25; 3.33];

xb=(inv(A'*A))*(A'*bb);

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