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 Inversion Sparse Matrix 

Code 1-20 of 60   Pages: Go to  1  2  3  Next >>  page  

finds null space and range of a sparse matrix using lu decomposition.

This routine is devoted to find null space of possibly large matrix fast.
Results may be inaccurate if zero and nonzero singular values are not well separated.

Return the optimal path given the adjacency/cost sparse matrix and source/destination nodes.

Run mexme_dijkstra.m to compile mex-files on your own-plateform

Run test_dijkstra.m for the demo

This is a program that generates a test problem for linear optimization with a sparse matrix. The test problem is of the kind

min c'*x
s.t. Aeq*x=beq

where lb is a zero vector and ub is greater then...

SYNTAX: B = fulltosparse(A)

A = full 2-dimensional double matrix
B = sparse 2-dimensional double matrix version of A

This example demonstrates how to populate a sparse matrix. For the purpose of this example, you must...

Return the optimal path given the adjacency/cost sparse matrix and source/destination nodes.

Run mexme_dijkstra.m to compile mex-files on your own-plateform.
Be sure that "mex -setup" have been done at least one.

This utility can be useful when you need to update a sparse matrix values
without changing its sparsity pattern.

Since MATLAB uses CSC (Compressed Sparse Column) format for sparse matries, the non-zeroes are stored in an array,...

NMath Matrix is a matrix manipulation library that can be used for different types of matrix expressions. Users are allowed to calculate variety of sparse matrix problems like, symmetric, hermitian, symmetric banded etc and to transpose them. They...

This file : eig_svd_herm_unit_pos_def_2.m is a modified (improved) version of my previous file. The main correction has been to include issparse() instead of class() to identify a Sparse Matrix. This change is essential for R13.


MATLAB sparse matrix converter to Hypre
MATLAB vector converter to Hypre
Hypre sparse matrix converter to MATLAB
Hypre vector converter to MATLAB

The Parallel High Performance Preconditioners (hypre) is a library of...

SHAREDMATRIX Allows any Matlab object (e.g., struct, nd-cell, nd-matrix, sparse matrix) to be shared between multiple Matlab sessions without resorting to file I/O. The Matlab sessions must have access to the same shared memory resources, i.e.,...

MESHND is an M-file toolbox for creating 2D and 3D meshes and ordering them with nested dissection. It can also create a sparse matrix from a regular mesh using an abitrary stencil.


A = meshsparse (meshnd...

'sparse' is a matrix class based on a dictionary to store data using 2-element tuples (i,j)
as keys (i is the row and j the column index). The common matrix operations such as
'dot' for the inner product, multiplication/division by a...

This is a dedicated mex-file for use with UMFPACK to efficiently complete the permuted forward/back substitution to solve linear systems, A*x = b when A is sparse and b is a dense vector.

UMFPACK is used when the MATLAB function...

The class ndSparse defined in this submission will give a lot of the functionality of N-dimensional sparse arrays for N possibly greater than 2. However, it should really be thought of as a way of starting with an ordinary MATLAB sparse matrix and...

object oriented numerical library for Delphi and C++ Builder users. Complete support for complex numbers for all functions in single or double precision. Matrix operations: Solving a system of linear equations with refinment and condition number...

outputs the array of algebraic smallest eigenvalues lambda and
corresponding matrix of orthonormalized eigenvectors blockVectorX of the Hermitian (full or sparse) operator operatorA...

H = hash;

H('key') = value; %assign value to key

v = H('key'); % retrieve value for a key

H.keys % return cell array of keys

H. values % return array of values

H.idx % returns sparse matrix of...

The package contains a set of C functions and preprocessor macros to simplify writing MEX source files. The routines help check input and output argument count, argument type, dimension and structure in a MEX file. See "common.c" in the...

The main file in this package, rsparse.m, creates a sparse array object that is a subclass of MATLAB's native sparse data type, but which is robust against certain bugs and errors (present as of R2009b).


LINES2IM generates an image with painted lines. The line-hues are the angles of the slopes.
Given a set of line coordinates:
X = [startx1 endx1; startx2 endx2;...]
Y = [starty1 endy1; starty2 endy2;...]
and a wanted image...