| trttp(3) | Library Functions Manual | trttp(3) |
NAME
trttp - trttp: triangular matrix, full (tr) to packed (tp)
SYNOPSIS
Functions
subroutine ctrttp (uplo, n, a, lda, ap, info)
CTRTTP copies a triangular matrix from the standard full format (TR) to
the standard packed format (TP). subroutine dtrttp (uplo, n, a, lda,
ap, info)
DTRTTP copies a triangular matrix from the standard full format (TR) to
the standard packed format (TP). subroutine strttp (uplo, n, a, lda,
ap, info)
STRTTP copies a triangular matrix from the standard full format (TR) to
the standard packed format (TP). subroutine ztrttp (uplo, n, a, lda,
ap, info)
ZTRTTP copies a triangular matrix from the standard full format (TR) to
the standard packed format (TP).
Detailed Description
Function Documentation
subroutine ctrttp (character uplo, integer n, complex, dimension( lda, * ) a, integer lda, complex, dimension( * ) ap, integer info)
CTRTTP copies a triangular matrix from the standard full format (TR) to the standard packed format (TP).
Purpose:
CTRTTP copies a triangular matrix A from full format (TR) to standard packed format (TP).
Parameters
UPLO is CHARACTER*1
= 'U': A is upper triangular;
= 'L': A is lower triangular.
N
N is INTEGER
The order of the matrices AP and A. N >= 0.
A
A is COMPLEX array, dimension (LDA,N)
On entry, the triangular matrix A. If UPLO = 'U', the leading
N-by-N upper triangular part of A contains the upper
triangular part of the matrix A, and the strictly lower
triangular part of A is not referenced. If UPLO = 'L', the
leading N-by-N lower triangular part of A contains the lower
triangular part of the matrix A, and the strictly upper
triangular part of A is not referenced.
LDA
LDA is INTEGER
The leading dimension of the array A. LDA >= max(1,N).
AP
AP is COMPLEX array, dimension ( N*(N+1)/2 ),
On exit, the upper or lower triangular matrix A, packed
columnwise in a linear array. The j-th column of A is stored
in the array AP as follows:
if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j;
if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=n.
INFO
INFO is INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
Author
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Definition at line 103 of file ctrttp.f.
subroutine dtrttp (character uplo, integer n, double precision, dimension( lda, * ) a, integer lda, double precision, dimension( * ) ap, integer info)
DTRTTP copies a triangular matrix from the standard full format (TR) to the standard packed format (TP).
Purpose:
DTRTTP copies a triangular matrix A from full format (TR) to standard packed format (TP).
Parameters
UPLO is CHARACTER*1
= 'U': A is upper triangular.
= 'L': A is lower triangular.
N
N is INTEGER
The order of the matrices AP and A. N >= 0.
A
A is DOUBLE PRECISION array, dimension (LDA,N)
On exit, the triangular matrix A. If UPLO = 'U', the leading
N-by-N upper triangular part of A contains the upper
triangular part of the matrix A, and the strictly lower
triangular part of A is not referenced. If UPLO = 'L', the
leading N-by-N lower triangular part of A contains the lower
triangular part of the matrix A, and the strictly upper
triangular part of A is not referenced.
LDA
LDA is INTEGER
The leading dimension of the array A. LDA >= max(1,N).
AP
AP is DOUBLE PRECISION array, dimension (N*(N+1)/2)
On exit, the upper or lower triangular matrix A, packed
columnwise in a linear array. The j-th column of A is stored
in the array AP as follows:
if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j;
if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=n.
INFO
INFO is INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
Author
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Definition at line 103 of file dtrttp.f.
subroutine strttp (character uplo, integer n, real, dimension( lda, * ) a, integer lda, real, dimension( * ) ap, integer info)
STRTTP copies a triangular matrix from the standard full format (TR) to the standard packed format (TP).
Purpose:
STRTTP copies a triangular matrix A from full format (TR) to standard packed format (TP).
Parameters
UPLO is CHARACTER*1
= 'U': A is upper triangular.
= 'L': A is lower triangular.
N
N is INTEGER
The order of the matrices AP and A. N >= 0.
A
A is REAL array, dimension (LDA,N)
On exit, the triangular matrix A. If UPLO = 'U', the leading
N-by-N upper triangular part of A contains the upper
triangular part of the matrix A, and the strictly lower
triangular part of A is not referenced. If UPLO = 'L', the
leading N-by-N lower triangular part of A contains the lower
triangular part of the matrix A, and the strictly upper
triangular part of A is not referenced.
LDA
LDA is INTEGER
The leading dimension of the array A. LDA >= max(1,N).
AP
AP is REAL array, dimension (N*(N+1)/2)
On exit, the upper or lower triangular matrix A, packed
columnwise in a linear array. The j-th column of A is stored
in the array AP as follows:
if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j;
if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=n.
INFO
INFO is INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
Author
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Definition at line 103 of file strttp.f.
subroutine ztrttp (character uplo, integer n, complex*16, dimension( lda, * ) a, integer lda, complex*16, dimension( * ) ap, integer info)
ZTRTTP copies a triangular matrix from the standard full format (TR) to the standard packed format (TP).
Purpose:
ZTRTTP copies a triangular matrix A from full format (TR) to standard packed format (TP).
Parameters
UPLO is CHARACTER*1
= 'U': A is upper triangular;
= 'L': A is lower triangular.
N
N is INTEGER
The order of the matrices AP and A. N >= 0.
A
A is COMPLEX*16 array, dimension (LDA,N)
On entry, the triangular matrix A. If UPLO = 'U', the leading
N-by-N upper triangular part of A contains the upper
triangular part of the matrix A, and the strictly lower
triangular part of A is not referenced. If UPLO = 'L', the
leading N-by-N lower triangular part of A contains the lower
triangular part of the matrix A, and the strictly upper
triangular part of A is not referenced.
LDA
LDA is INTEGER
The leading dimension of the array A. LDA >= max(1,N).
AP
AP is COMPLEX*16 array, dimension ( N*(N+1)/2 ),
On exit, the upper or lower triangular matrix A, packed
columnwise in a linear array. The j-th column of A is stored
in the array AP as follows:
if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j;
if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=n.
INFO
INFO is INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
Author
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Definition at line 103 of file ztrttp.f.
Author
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