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$Old$ November 14th, 2008, 10:17 PM

maria_stoeva $maria_stoeva is offline$

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$Default$ least-squares solution

Sorry to botter you again but this I can't solve. I really need your help
I posted it before but the format of the matrix was crappy
Let A = (1 -2
-1 2
0 3
2 5)
and b = ( 3
1
-4
2)

(a) Find a least-squares solution of Ax = b.
(b) Find the orthogonal projection of b onto the column space of A.
(c) Compute the least-squares error ( in the solution of part ( a )).
Thank you!

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