org.netlib.lapack
Class DTPTRS

java.lang.Object
  extended by org.netlib.lapack.DTPTRS

public class DTPTRS
extends java.lang.Object

DTPTRS is a simplified interface to the JLAPACK routine dtptrs.
This interface converts Java-style 2D row-major arrays into
the 1D column-major linearized arrays expected by the lower
level JLAPACK routines.  Using this interface also allows you
to omit offset and leading dimension arguments.  However, because
of these conversions, these routines will be slower than the low
level ones.  Following is the description from the original Fortran
source.  Contact seymour@cs.utk.edu with any questions.

* .. * * Purpose * ======= * * DTPTRS solves a triangular system of the form * * A * X = B or A**T * X = B, * * where A is a triangular matrix of order N stored in packed format, * and B is an N-by-NRHS matrix. A check is made to verify that A is * nonsingular. * * Arguments * ========= * * UPLO (input) CHARACTER*1 * = 'U': A is upper triangular; * = 'L': A is lower triangular. * * TRANS (input) CHARACTER*1 * Specifies the form of the system of equations: * = 'N': A * X = B (No transpose) * = 'T': A**T * X = B (Transpose) * = 'C': A**H * X = B (Conjugate transpose = Transpose) * * DIAG (input) CHARACTER*1 * = 'N': A is non-unit triangular; * = 'U': A is unit triangular. * * N (input) INTEGER * The order of the matrix A. N >= 0. * * NRHS (input) INTEGER * The number of right hand sides, i.e., the number of columns * of the matrix B. NRHS >= 0. * * AP (input) DOUBLE PRECISION array, dimension (N*(N+1)/2) * 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)*(2*n-j)/2) = A(i,j) for j<=i<=n. * * B (input/output) DOUBLE PRECISION array, dimension (LDB,NRHS) * On entry, the right hand side matrix B. * On exit, if INFO = 0, the solution matrix X. * * LDB (input) INTEGER * The leading dimension of the array B. LDB >= max(1,N). * * INFO (output) INTEGER * = 0: successful exit * < 0: if INFO = -i, the i-th argument had an illegal value * > 0: if INFO = i, the i-th diagonal element of A is zero, * indicating that the matrix is singular and the * solutions X have not been computed. * * ===================================================================== * * .. Parameters ..


Constructor Summary
DTPTRS()
           
 
Method Summary
static void DTPTRS(java.lang.String uplo, java.lang.String trans, java.lang.String diag, int n, int nrhs, double[] ap, double[][] b, intW info)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

DTPTRS

public DTPTRS()
Method Detail

DTPTRS

public static void DTPTRS(java.lang.String uplo,
                          java.lang.String trans,
                          java.lang.String diag,
                          int n,
                          int nrhs,
                          double[] ap,
                          double[][] b,
                          intW info)