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Rank deficient overdeterminated linear system

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mohsen
mohsen 2014-6-18
编辑： Matt J 2014-6-18
Hi
I have an overdeterminated system and my coefficient matrix is not full rank.
I try solving it with SVD or QR but because of rank deficiency I obtain wrong answer. Somone can axplain for me how I can achieve correct answer for this system?

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回答（1 个）

Matt J
Matt J 2014-6-18
If the matrix is rank deficient, it cannot be over-determined. Try PINV, but realize that the solution space is not unique.
  2 个评论
mohsen
mohsen 2014-6-18
I use Pinv already . I wanna an unique answer .
Matt J
Matt J 2014-6-18
编辑：Matt J 2014-6-18
Again, your equations can't have a unique solution if indeed they are rank defficient. You need more equations.

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