Question

PLEASE USE MATLAB ONLY PLEASE!!

Modify MYSOLVER.m to make sure the inputs are valid. Your function should checlk for each of the following cases: 1. A is not a square matrix; 2. b is not a column vector; 3. Ax and b do not have the same dimension. Submit your m-file and a diary showing how you tested the code. Only submit the m-file for MYSOLVER.m. Do not submit the m-files for backward.m. forward.m, or MYLU.m. Test to show that each error code works and that the program still works using the follow tests. (1) To test the error of A not being a square matrix use A= 34 2) To test the error of b not being a column vector use b-(1 2) (3) To test the error of Ar and b not having compatible dimensions use (4) To test that the program still works given no errors use Then make sure that Arb.

Answer 1

clc;clear all;
%case.1.A is not a square matrix
r=input('Enter the row\n');
c=input('Enetr the colum\n');
for i=1:r
for j=1:c
fprintf( 'A(%1.0f,%1.0f)=',i,j);
A(i,j)=input('\n');
end
end
fprintf('A=\n');
disp(A);
if r==c
fprintf('The given matrix is squar matrix\n',A);
else
fprintf('The given matrix is not squar matrix\n',A);
end

%case.2.b is not a column vector
r=input('Enter the row\n');
c=input('Enetr the colum\n');

for i=1:r
for j=1:c
fprintf( 'b(%1.0f,%1.0f)=',i,j);
b(i,j)=input(' \n');
end
end
fprintf('b=\n');
disp(b);
if c==1
fprintf('The given matrix is column vector\n',A);
else
fprintf('The given matrix is not column vector\n',A);
end
%case.3.Ax and b do not have the same dimension
[m1,n1] = size(A);
[m2,n2] = size(b);
if m1==m2
fprintf('Ax and b have the same dimension\n');
else
fprintf('Ax and b have not the same dimension\n');
end

Enter the row Enetr the colum 2 2 A (2,2) A (3,2) 2

A- 6 The given matrix is not squar matrix Enter the row Enetr the colum b(3,1)= 2 The given matrix is column vector Ax and b have the same dimension