subroutine ztrttp (UPLO, N, A, LDA, AP, INFO)
subroutine ztrttp (characterUPLO, integerN, complex*16, dimension( lda, * )A, integerLDA, complex*16, dimension( * )AP, integerINFO)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).
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
Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd.Date:
September 2012Definition at line 105 of file ztrttp.f.