LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
|
subroutine clattb | ( | integer | IMAT, |
character | UPLO, | ||
character | TRANS, | ||
character | DIAG, | ||
integer, dimension( 4 ) | ISEED, | ||
integer | N, | ||
integer | KD, | ||
complex, dimension( ldab, * ) | AB, | ||
integer | LDAB, | ||
complex, dimension( * ) | B, | ||
complex, dimension( * ) | WORK, | ||
real, dimension( * ) | RWORK, | ||
integer | INFO | ||
) |
CLATTB
CLATTB generates a triangular test matrix in 2-dimensional storage. IMAT and UPLO uniquely specify the properties of the test matrix, which is returned in the array A.
[in] | IMAT | IMAT is INTEGER An integer key describing which matrix to generate for this path. |
[in] | UPLO | UPLO is CHARACTER*1 Specifies whether the matrix A will be upper or lower triangular. = 'U': Upper triangular = 'L': Lower triangular |
[in] | TRANS | TRANS is CHARACTER*1 Specifies whether the matrix or its transpose will be used. = 'N': No transpose = 'T': Transpose = 'C': Conjugate transpose (= transpose) |
[out] | DIAG | DIAG is CHARACTER*1 Specifies whether or not the matrix A is unit triangular. = 'N': Non-unit triangular = 'U': Unit triangular |
[in,out] | ISEED | ISEED is INTEGER array, dimension (4) The seed vector for the random number generator (used in CLATMS). Modified on exit. |
[in] | N | N is INTEGER The order of the matrix to be generated. |
[in] | KD | KD is INTEGER The number of superdiagonals or subdiagonals of the banded triangular matrix A. KD >= 0. |
[out] | AB | AB is COMPLEX array, dimension (LDAB,N) The upper or lower triangular banded matrix A, stored in the first KD+1 rows of AB. Let j be a column of A, 1<=j<=n. If UPLO = 'U', AB(kd+1+i-j,j) = A(i,j) for max(1,j-kd)<=i<=j. If UPLO = 'L', AB(1+i-j,j) = A(i,j) for j<=i<=min(n,j+kd). |
[in] | LDAB | LDAB is INTEGER The leading dimension of the array AB. LDAB >= KD+1. |
[out] | B | B is COMPLEX array, dimension (N) |
[out] | WORK | WORK is COMPLEX array, dimension (2*N) |
[out] | RWORK | RWORK is REAL array, dimension (N) |
[out] | INFO | INFO is INTEGER = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value |