search for: eivenvalues

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2002 Jan 05
1
possible bug in det using method="qr" (PR#1244)
Full_Name: Armin Roehrl Version: 1.4.0(2001-12-19) OS: Linux; Suse 7.3 Submission from: (NULL) (217.84.18.204) Hello, On a given matrix det returns different results whether I use the method "qr" or "eivenvalues". The matrix: > m2 [,1] [,2] [,3] [1,] 9.822616e+09 3.841723e+09 79790.09 [2,] 3.841723e+09 1.502536e+09 31251.82 [3,] 7.979009e+04 3.125182e+04 64156419.36 > det(m2, method="eigenvalues") [1] -9.331893e+19 > det(m2, method="qr&quot...