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【求助】Fast_diag 參數(shù)設(shè)置對計(jì)算結(jié)果的影響?
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請問各位,F(xiàn)ast_diag 這個(gè)參數(shù)設(shè)置,對計(jì)算速度有什么影響? 其中,MS 幫助手冊提供了一種最快的算法,對于有些體系,有收斂性問題,不知道誰測試過,哪些體系面臨收斂性問題? Setting the values to 0 0 specifies the Lapack 2.0 zheev and dsyev routines. These are the slowest but most reliable diagonalization techniques. Setting the value to 1 1 specifies the Lapack 3.0 zheevd and dsyevd routines, which use an efficient "divide and conquer" algorithm. These techniques are faster then zheev and dsyev, however they require more memory. This is the default setting. Setting the value to 2 2 uses the newest Lapack3.0 zheevr and dsyevr routines. These are by far the fastest techniques, however in several tests they failed to find eigenvectors. 你們計(jì)算時(shí),一般都是如何設(shè)置的? |

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