la_lapack::lapll Interface Reference

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. More...

Public Member Functions
pure subroutine	clapll (n, x, incx, y, incy, ssmin)
	la_clapll
pure subroutine	dlapll (n, x, incx, y, incy, ssmin)
	la_dlapll
	la_qlapll
pure subroutine	slapll (n, x, incx, y, incy, ssmin)
	la_slapll
	la_wlapll
pure subroutine	zlapll (n, x, incx, y, incy, ssmin)
	la_zlapll

Detailed Description

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.

Member Function/Subroutine Documentation

clapll()

pure subroutine la_lapack::lapll::clapll	(	integer(ilp), intent(in)	n,
		complex(sp), dimension(*), intent(inout)	x,
		integer(ilp), intent(in)	incx,
		complex(sp), dimension(*), intent(inout)	y,
		integer(ilp), intent(in)	incy,
		real(sp), intent(out)	ssmin
	)

dlapll()

pure subroutine la_lapack::lapll::dlapll	(	integer(ilp), intent(in)	n,
		real(dp), dimension(*), intent(inout)	x,
		integer(ilp), intent(in)	incx,
		real(dp), dimension(*), intent(inout)	y,
		integer(ilp), intent(in)	incy,
		real(dp), intent(out)	ssmin
	)

la_clapll()

la_lapack::lapll::la_clapll

la_dlapll()

la_lapack::lapll::la_dlapll

la_qlapll()

la_lapack::lapll::la_qlapll

la_slapll()

la_lapack::lapll::la_slapll

la_wlapll()

la_lapack::lapll::la_wlapll

la_zlapll()

la_lapack::lapll::la_zlapll

slapll()

pure subroutine la_lapack::lapll::slapll	(	integer(ilp), intent(in)	n,
		real(sp), dimension(*), intent(inout)	x,
		integer(ilp), intent(in)	incx,
		real(sp), dimension(*), intent(inout)	y,
		integer(ilp), intent(in)	incy,
		real(sp), intent(out)	ssmin
	)

zlapll()

pure subroutine la_lapack::lapll::zlapll	(	integer(ilp), intent(in)	n,
		complex(dp), dimension(*), intent(inout)	x,
		integer(ilp), intent(in)	incx,
		complex(dp), dimension(*), intent(inout)	y,
		integer(ilp), intent(in)	incy,
		real(dp), intent(out)	ssmin
	)

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The documentation for this interface was generated from the following file:

• la_lapack.f90