How to use regression?

I have 2 vectors and i want to obtain a correlation between them like y=ax+b by using regression, but i don't know how to use this code. would anyone help me with this?

Answer 1

[Walter Roberson]

coeffs = polyfit(FirstVector, SecondVector, 1);

Then coeffs(1) will be your a, and coeffs(2) will be your b.

[Ghazal Hnr]

Isn't any way to write with regression code?

[Walter Roberson]

That is regression code.

A different way of writing the same thing:

A = [FirstVector(:), ones(numel(FirstVector),1)];
b = SecondVector(:);
coeffs = A\b;

[Ghazal Hnr]

thank you very much

[Walter Roberson]

Note that when I say "a different way of writing the same thing", I mean that polyfit() really does construct those matrices and use the \ operator.