Confusing about applying weighted least square for constant fitting
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WeiHao Xu
am 19 Jul. 2021
Kommentiert: Matt J
am 19 Jul. 2021
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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Torsten
am 19 Jul. 2021
Bearbeitet: Torsten
am 19 Jul. 2021
X = ones(N,1)
W = diag(w)
Y = y
where y is the (Nx1) column vector of the measurements and w is the (Nx1) column vector of weights.
The result of your formula is the coefficient a of the line y=a that best approximates the measurements.
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