推 cuttlefish : 你沒給\epsilon, Xii, hii各是什麼 11/03 11:55
→ cuttlefish : 稍算了一下 取B=(X'X)^{-1}, C=Xi 11/03 11:56
→ cuttlefish : 猜hii = Xi'(X'X)^{-1}Xi 11/03 11:56
→ cuttlefish : 提示是Sherman–Morrison formula 11/03 11:59
→ cuttlefish : 更正 B=X'X 11/03 11:59