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- CCCCLLLLAAAAPPPPLLLLLLLL((((3333SSSS)))) CCCCLLLLAAAAPPPPLLLLLLLL((((3333SSSS))))
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- NNNNAAAAMMMMEEEE
- CLAPLL - two column vectors X and Y, let A = ( X Y )
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- SUBROUTINE CLAPLL( N, X, INCX, Y, INCY, SSMIN )
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- INTEGER INCX, INCY, N
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- REAL SSMIN
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- COMPLEX X( * ), Y( * )
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- IIIIMMMMPPPPLLLLEEEEMMMMEEEENNNNTTTTAAAATTTTIIIIOOOONNNN
- These routines are part of the SCSL Scientific Library and can be loaded
- using either the -lscs or the -lscs_mp option. The -lscs_mp option
- directs the linker to use the multi-processor version of the library.
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- When linking to SCSL with -lscs or -lscs_mp, the default integer size is
- 4 bytes (32 bits). Another version of SCSL is available in which integers
- are 8 bytes (64 bits). This version allows the user access to larger
- memory sizes and helps when porting legacy Cray codes. It can be loaded
- by using the -lscs_i8 option or the -lscs_i8_mp option. A program may use
- only one of the two versions; 4-byte integer and 8-byte integer library
- calls cannot be mixed.
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- PPPPUUUURRRRPPPPOOOOSSSSEEEE
- Given two column vectors X and Y, let A = ( X Y ). The subroutine first
- computes the QR factorization of A = Q*R, and then computes the SVD of
- the 2-by-2 upper triangular matrix R. The smaller singular value of R is
- returned in SSMIN, which is used as the measurement of the linear
- dependency of the vectors X and Y.
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- AAAARRRRGGGGUUUUMMMMEEEENNNNTTTTSSSS
- N (input) INTEGER
- The length of the vectors X and Y.
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- X (input/output) COMPLEX array, dimension (1+(N-1)*INCX)
- On entry, X contains the N-vector X. On exit, X is overwritten.
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- INCX (input) INTEGER
- The increment between successive elements of X. INCX > 0.
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- Y (input/output) COMPLEX array, dimension (1+(N-1)*INCY)
- On entry, Y contains the N-vector Y. On exit, Y is overwritten.
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- INCY (input) INTEGER
- The increment between successive elements of Y. INCY > 0.
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- SSMIN (output) REAL
- The smallest singular value of the N-by-2 matrix A = ( X Y ).
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- PPPPaaaaggggeeee 1111
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- CCCCLLLLAAAAPPPPLLLLLLLL((((3333SSSS)))) CCCCLLLLAAAAPPPPLLLLLLLL((((3333SSSS))))
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- INTRO_LAPACK(3S), INTRO_SCSL(3S)
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- This man page is available only online.
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- PPPPaaaaggggeeee 2222
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