table of contents
| tpttr(3) | LAPACK | tpttr(3) |
NAME¶
tpttr - tpttr: triangular matrix, packed (tp) to full (tr)
SYNOPSIS¶
Functions¶
subroutine ctpttr (uplo, n, ap, a, lda, info)
CTPTTR copies a triangular matrix from the standard packed format (TP)
to the standard full format (TR). subroutine dtpttr (uplo, n, ap, a,
lda, info)
DTPTTR copies a triangular matrix from the standard packed format (TP)
to the standard full format (TR). subroutine stpttr (uplo, n, ap, a,
lda, info)
STPTTR copies a triangular matrix from the standard packed format (TP)
to the standard full format (TR). subroutine ztpttr (uplo, n, ap, a,
lda, info)
ZTPTTR copies a triangular matrix from the standard packed format (TP)
to the standard full format (TR).
Detailed Description¶
Function Documentation¶
subroutine ctpttr (character uplo, integer n, complex, dimension( * ) ap, complex, dimension( lda, * ) a, integer lda, integer info)¶
CTPTTR copies a triangular matrix from the standard packed format (TP) to the standard full format (TR).
Purpose:
CTPTTR copies a triangular matrix A from standard packed format (TP)
to standard full format (TR).
Parameters
UPLO is CHARACTER*1
= 'U': A is upper triangular.
= 'L': A is lower triangular.
N
N is INTEGER
The order of the matrix A. N >= 0.
AP
AP is COMPLEX array, dimension ( N*(N+1)/2 ),
On entry, 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.
A
A is COMPLEX 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).
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.
subroutine dtpttr (character uplo, integer n, double precision, dimension( * ) ap, double precision, dimension( lda, * ) a, integer lda, integer info)¶
DTPTTR copies a triangular matrix from the standard packed format (TP) to the standard full format (TR).
Purpose:
DTPTTR copies a triangular matrix A from standard packed format (TP)
to standard full format (TR).
Parameters
UPLO is CHARACTER*1
= 'U': A is upper triangular.
= 'L': A is lower triangular.
N
N is INTEGER
The order of the matrix A. N >= 0.
AP
AP is DOUBLE PRECISION array, dimension ( N*(N+1)/2 ),
On entry, 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.
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).
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.
subroutine stpttr (character uplo, integer n, real, dimension( * ) ap, real, dimension( lda, * ) a, integer lda, integer info)¶
STPTTR copies a triangular matrix from the standard packed format (TP) to the standard full format (TR).
Purpose:
STPTTR copies a triangular matrix A from standard packed format (TP)
to standard full format (TR).
Parameters
UPLO is CHARACTER*1
= 'U': A is upper triangular.
= 'L': A is lower triangular.
N
N is INTEGER
The order of the matrix A. N >= 0.
AP
AP is REAL array, dimension ( N*(N+1)/2 ),
On entry, 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.
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).
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.
subroutine ztpttr (character uplo, integer n, complex*16, dimension( * ) ap, complex*16, dimension( lda, * ) a, integer lda, integer info)¶
ZTPTTR copies a triangular matrix from the standard packed format (TP) to the standard full format (TR).
Purpose:
ZTPTTR copies a triangular matrix A from standard packed format (TP)
to standard full format (TR).
Parameters
UPLO is CHARACTER*1
= 'U': A is upper triangular.
= 'L': A is lower triangular.
N
N is INTEGER
The order of the matrix A. N >= 0.
AP
AP is COMPLEX*16 array, dimension ( N*(N+1)/2 ),
On entry, 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.
A
A is COMPLEX*16 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).
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.
Author¶
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| Wed Feb 7 2024 11:30:40 | Version 3.12.0 |