help with this matlab script

Write a MATLAB script which will load an n x 2 matrix A of data and determine slope m and y intercept b of a line which minimizes the least square distance the data {A(I,1),A(I,2)} from I=1 to n and the points {A(I,1),mA(I,1)+b} from I=1 to n.

m=1;

b=1;

for i=1:10000

    m=((-b*x(i))-(x(i)*y(i)))/(x(i)^2);

    b=((-m*(x(i)^2))+(x(i)*y(i)))/(x(i));

end

A=[m,b];

rref (A)

I got an error message: Undefined function 'x' for input arguments of type 'double'.

Answer 1

[Nalini Vishnoi]

You are getting this error because variables x and y are not defined in your script. I think what you intended was something like the following:

x = A(:,1); 
y = A(:,2);