在R核中没有LU分解函数。虽然这类分解是solve的一个步骤,但它并不是作为独立函数显式提供的。我们能为这个写一个R函数吗?它需要模拟LAPACK例程dgetrf。Matrix包有一个很好的function,但是如果我们可以编写一个可跟踪的R函数,那就更好了。 将矩阵分解到某一列/行,并返回中间结果; 继续从中间结果到另一列/行或...
// Inversion Matrix : passing Matrixes by Reference void matrix_inverse_lapack(vector<vector<double>> const &F_matrix, vector<vector<double>> &F_output) { // Index for loop and arrays int i, j, ip, idx; // Size of F_matrix int N = F_matrix.size(); ...
info2=LAPACKE_dgetrs(LAPACK_ROW_MAJOR,'N',n,1,&A[0],n,&pivots[0],&b[0],1);Results: info=-4;info2=-5; that means problems on A. If I change the A initialization to:A[i*n+j]=//values (plus is removed)then the program runs, info=0, info2=0. But the solution b ...
In the end I want to scale the code to a (33,33) matrix. But I'm first trying to get it working for this (2,2) matrix. The documentation of dgetrf (http://www.netlib.org/lapack/explore-html/dd/d9a/group__double_g_ecomputational_ga0019443faea08275ca60a734d0593e60.html) says: ...
Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date: November 2011 Definition at line 109 of file dgetrf.f. Author Generated automatically by Doxygen for LAPACK from the source code.
best regards call dgetrf( NUN, NUN, KG, NDOF, ipiv, info1 ) call dgetrs( 'N', NUN, 1_4, KG, NDOF, ipiv, RG, NDOF, info2 ) mikrom (Programmer) 29 Jul 12 09:41 The subroutines are from Lapack: http://www.netlib.org/lapack/double/dgetrf.f http://www.netlib.org/lapack...
Specified as: an integer. The value of thematrix_layoutargument must be LAPACK_ROW_MAJOR or LAPACK_COL_MAJOR. m the number of rows in general matrixAused in the computation. Specified as: an integer; 0mlda. n the number of columns in general matrixAused in the computation. ...
Hello guys, I am trying to invert matrix in VBA Excel 32bit by using Lapack DGETRF/DGETRI function from mkl_rt.dll, which placed in
Hi! I am trying to use the LU factorization and subsequent solver in LAPACK for double complex matrices, zgetrf and zgetrs. However, it only works
[fortran]program getrfEx use mkl95_lapack,only : getrf implicit none integer, parameter :: N = 4 integer :: i,j real(8), dimension(N,N) :: A = & (/ 5,7,6,5,7,10,8,7,6,8,10,9,5,7,9,10/) integer, dimension(N) :: piv integer :: info call getrf( a, piv, info ...