Program f11mkfe
! F11MKF Example Program Text
! Mark 30.1 Release. NAG Copyright 2024.
! .. Use Statements ..
Use nag_library, Only: f11mkf, nag_wp, x04caf
! .. Implicit None Statement ..
Implicit None
! .. Parameters ..
Real (Kind=nag_wp), Parameter :: alpha = 1.E0_nag_wp
Real (Kind=nag_wp), Parameter :: beta = 0.E0_nag_wp
Integer, Parameter :: nin = 5, nout = 6
! .. Local Scalars ..
Integer :: i, ifail, j, ldb, ldc, m, n, nnz
Character (1) :: trans
! .. Local Arrays ..
Real (Kind=nag_wp), Allocatable :: a(:), b(:,:), c(:,:)
Integer, Allocatable :: icolzp(:), irowix(:)
! .. Executable Statements ..
Write (nout,*) 'F11MKF Example Program Results'
! Skip heading in data file
Read (nin,*)
! Read order of matrix
Read (nin,*) n, m
ldb = n
ldc = n
Allocate (b(ldb,m),c(ldc,m),icolzp(n+1))
! Read the matrix A
Read (nin,*) icolzp(1:n+1)
nnz = icolzp(n+1) - 1
Allocate (a(nnz),irowix(nnz))
Do i = 1, nnz
Read (nin,*) a(i), irowix(i)
End Do
! Read the matrix B
Do j = 1, m
Read (nin,*) b(1:n,j)
End Do
! Calculate matrix-matrix product
trans = 'N'
! ifail: behaviour on error exit
! =0 for hard exit, =1 for quiet-soft, =-1 for noisy-soft
ifail = 0
Call f11mkf(trans,n,m,alpha,icolzp,irowix,a,b,ldb,beta,c,ldc,ifail)
! Output results
Write (nout,*)
Flush (nout)
Call x04caf('G',' ',n,m,c,ldc,'Matrix-matrix product',ifail)
! Calculate transposed matrix-matrix product
trans = 'T'
ifail = 0
Call f11mkf(trans,n,m,alpha,icolzp,irowix,a,b,ldb,beta,c,ldc,ifail)
! Output results
Write (nout,*)
Flush (nout)
Call x04caf('G',' ',n,m,c,ldc,'Transposed matrix-matrix product',ifail)
End Program f11mkfe