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java.lang.Object | +----org.netlib.lapack.DORGR2
DORGR2 is a simplified interface to the JLAPACK routine dorgr2. 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 * ======= * * DORGR2 generates an m by n real matrix Q with orthonormal rows, * which is defined as the last m rows of a product of k elementary * reflectors of order n * * Q = H(1) H(2) . . . H(k) * * as returned by DGERQF. * * Arguments * ========= * * M (input) INTEGER * The number of rows of the matrix Q. M >= 0. * * N (input) INTEGER * The number of columns of the matrix Q. N >= M. * * K (input) INTEGER * The number of elementary reflectors whose product defines the * matrix Q. M >= K >= 0. * * A (input/output) DOUBLE PRECISION array, dimension (LDA,N) * On entry, the (m-k+i)-th row must contain the vector which * defines the elementary reflector H(i), for i = 1,2,...,k, as * returned by DGERQF in the last k rows of its array argument * A. * On exit, the m by n matrix Q. * * LDA (input) INTEGER * The first dimension of the array A. LDA >= max(1,M). * * TAU (input) DOUBLE PRECISION array, dimension (K) * TAU(i) must contain the scalar factor of the elementary * reflector H(i), as returned by DGERQF. * * WORK (workspace) DOUBLE PRECISION array, dimension (M) * * INFO (output) INTEGER * = 0: successful exit * < 0: if INFO = -i, the i-th argument has an illegal value * * ===================================================================== * * .. Parameters ..
public DORGR2()
public static void DORGR2(int m, int n, int k, double a[][], double tau[], double work[], intW info)
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