2009-02-09

第三次模擬考 考題

第6題
show that if
[A I] [x] = [b]
[OA^t] [ r ] [0 ]
that x is a least squares solution to the sys. Ax=b and r is the residul vector.
問:什麼是 residul vector
於

1 則留言:

  1. 黃子嘉2009年2月21日 晚上10:10

    Ax = b的residual vector定義為
    r(x) = b - Ax
    least square solution就是minimize
    ||r(x)|| = ||b - Ax||

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