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I'm now fitting a line with noise. My equation is to minimize corresponding to equation , then I have and with data. I want to caculate the best y. The WSL gives for the answer. But now my confusing is what is Y? Is this , which means my code is

(1) is the matrix with number 1. Is this right for me? or I should use other function such as fminsearch(I saw in the community, maybe it's still my missunderstanding)...Thanks

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