TROUBLESHOOTING: Fix the errors in the code below

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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 TROUBLESHOOTING: Fix the errors in the code below

MATLAB

function [x,numIter,omega] = gaussSeidel(func,x,maxIter,epsilon)

% Solves Ax = b by Gauss-Seidel method with relaxation.

% USAGE: [x,numIter,omega] = gaussSeidel(func,x,maxIter,epsilon)

% INPUT:

% func = handle of function that returns improved x using

% x = starting solution vector

% maxIter = allowable number of iterations (default is 500)

% epsilon = error tolerance (default is 1.0e-9)

% OUTPUT:

% x = solution vector

% numIter = number of iterations carried out

% omega = computed relaxation factor

if nargin < 4; epsilon = 1.0e-9; end

if nargin < 3; maxIter = 500; end

k = 10; p = 1; omega = 1;

for numIter = 1:maxIter

xOld = x;

x = feval(func,x,omega);

dx = sqrt(dot(x - xOld,x - xOld));

if dx < epsilon; return; end

if numIter == k; dx1 = dx; end

if numIter == k + p

omega = 2/(1 + sqrt(1 - (dx/dx1)ˆ(1/p)));

end

end

error(’Too many iterations’)



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