manipmatrixmodule::diagmatmul Interface Reference

Matrix multiplication involving diagonal matrices. More...

Public Member Functions
subroutine	diagmatmulmat (D, A, B, iflag, ierr)
	Performs the matrix multiplication B = c1∗B + c2∗D∗A. More...
subroutine	diagmatmulvec (D, X, Y, iflag, ierr)
	Performs the matrix-vector multiplication Y = c1∗Y + c2∗D∗X. More...

Detailed Description

Matrix multiplication involving diagonal matrices.

Member Function/Subroutine Documentation

diagmatmulmat()

subroutine manipmatrixmodule::diagmatmul::diagmatmulmat	(	real(dp), dimension(:), intent(in)	D,
		real(dp), dimension(:,:), intent(in)	A,
		real(dp), dimension(:,:), intent(out)	B,
		integer, intent(in)	iflag,
		integer, intent(out)	ierr
	)

Performs the matrix multiplication B = c1∗B + c2∗D∗A.

D is a diagonal matrix, whereas B and A are full matrices. The value of the parameters c1 and c2 are determined from the input variable iflag, as follows:

• iflag = 1 : c1 = 0, c2 = 1
• iflag = -1 : c1 = 0, c2 = -1
• iflag = 2 : c1 = 1, c2 = 1
• iflag = -2 : c1 = 1, c2 = -1

Author

Knut Morten Okstad

Date

Jan 2003

diagmatmulvec()

subroutine manipmatrixmodule::diagmatmul::diagmatmulvec	(	real(dp), dimension(:), intent(in)	D,
		real(dp), dimension(:), intent(in)	X,
		real(dp), dimension(:), intent(out)	Y,
		integer, intent(in)	iflag,
		integer, intent(out)	ierr
	)

Performs the matrix-vector multiplication Y = c1∗Y + c2∗D∗X.

D is a diagonal matrix, whereas Y and X are vectors. The value of the parameters c1 and c2 are determined from the input variable iflag, as follows:

• iflag = 1 : c1 = 0, c2 = 1
• iflag = -1 : c1 = 0, c2 = -1
• iflag = 2 : c1 = 1, c2 = 1
• iflag = -2 : c1 = 1, c2 = -1

Author

Knut Morten Okstad

Date

Jan 2003

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

• src/vpmUtilities/manipMatrixModule.f90