How do I correct the error "Matrix dimensions must agree"?

I am using the following code, however, I keep getting a matrix dimensions must agree error. How would I correct this?

A = [1 0 0 0;1 0 1 0; 0 1 1 0; 0 1 0 1; 0 0 0 1];
b = [1; 3; 5; 7; 4];
x = [1; 3; 5; 7; 4];
N = 64;
theta = 3:3:180;
xLS = A\b;

k = [50,100,200,400,800];
X = kaczmarz(A,b,k);
e = zeros(length(k),1)
 for i=1:length(k), e(i) = norm(x-X(:,i),inf); end
e
figure(2), semilogy(k,e)

e =

     0
     0
     0
     0
     0

Matrix dimensions must agree.

[David Hill]

Need to know the output of kaczmar()

[Ryan]

>> X = kaczmarz(A,b,k)

X =

    1.0000    1.0000    1.0000    1.0000    1.0000
    3.0000    3.0000    3.0000    3.0000    3.0000
    2.0000    2.0000    2.0000    2.0000    2.0000
    4.0000    4.0000    4.0000    4.0000    4.0000

Answer 1

[David Hill]

Your problem is with the norm() function. You cannot subtract at 4x1 vector from a 5x1. Maybe you ment:

for i=1:length(k), e(i) = norm(x'-X(i,:),inf); end

[Ryan]

Excellent! Thanks for that! All working now.