[理工] 最小誤差觀念
有關這題想問看看這個方法行不行得通
題目要求Ax=b跟b+c有最小誤差
所以就是找x滿足b&b+c到R(A)上的距離相同
照理來說用幾何的觀念
c這個向量保證在R(A)上
剛好我用A行獨立的向量去試每個答案
剛好跟解答相同
所以代表這個方法是可行的嗎?
不然要算投影矩陣再算距離真的頗耗時間
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