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updated 2 days ago

Active contours driven by local Gaussian distribution fitting energy by li wang

li wang (view profile)

This Matlab code implements a segmentation method using local Gaussian distribution fitting energy. (sparse, sparse representation, level set)

evolution_LGD(Img,u,epsilon,Ksigma,KONE,KI,KI2,mu,nu,lamb...

Demo_LGD_4.m

Demo_LGD_3.m

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updated 12 days ago

LRSLibrary by Andrews Sobral

Low-Rank and Sparse Tools for Background Modeling and Subtraction in Videos (computer vision, tensor, matrix)

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updated 5 months ago

Slides for the video "Direct Methods for Sparse Linear Systems : the MATLAB sparse backslash" by Tim Davis

Tim Davis (view profile)

Slides for a plenary talk at the 2006 SIAM Annual Meeting (whitepaper, article, paper)

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updated 5 months ago

MESHND by Tim Davis

Tim Davis (view profile)

creation and nested dissection of regular 2D and 3D meshes (nested dissection, linear algebra, sparse)

meshnd

meshnd_example

meshnd_quality

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updated 5 months ago

UFget: MATLAB interface to the UF sparse matrix collection by Tim Davis

Tim Davis (view profile)

Downloads sparse matrices from the web directly into the MATLAB workspace, from a vast range of real (linear algebra, sparse, matrix)

UFget

UFget_defaults

UFget_lookup

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updated 5 months ago

spok: checks if a MATLAB sparse matrix is OK by Tim Davis

Tim Davis (view profile)

Useful for mexFunction authors only (linear algebra, sparse, mex)

spok

spok_install

spok_test

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updated 5 months ago

subsref2 by Tim Davis

Tim Davis (view profile)

subsref2 is a replacement for subsref, performing the computation C=A(i,j). (sparse, subsref)

subsref2

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updated 5 months ago

sparseinv: sparse inverse subset by Tim Davis

Tim Davis (view profile)

Computes a subset of inv(A) for a real sparse matrix A, using Takahashi's equations. (sparse, inverse)

sparseinv

sparseinv_install

sparseinv_test

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updated 7 months ago

3D mesh transform using sparse control points by Daniel Markel

Performs a 3D non-rigid deformation using irregularly placed transformation vectors (non rigid, deformation, sparse)

inhull(testpts,xyz,tess,tol)

mesh_transform3D2(im,bold,bnew,tmesh,X,Y,Z)

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updated 9 months ago

Find maximal cliques for large & sparse network by max Wei

max Wei (view profile)

Find maximal cliques for large & sparse network (graph, clique, sparse)

ELSclique( A )

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updated 10 months ago

Fast SVD and PCA by Vipin Vijayan

Fast truncated SVD and PCA rectangular matrices (singular value decomp..., svd, principal component a...)

pcaecon(X,k)

pcasecon(X,k)

svdecon(X)

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updated 11 months ago

Sparse block diagonal concatenation by Rody Oldenhuis

Rody Oldenhuis (view profile)

Sparse version of BLKDIAG() (blkdiag, block diagonal, sparse)

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updated 1 year ago

GPU sparse, accumarray, non-uniform grid by Stefano

Stefano (view profile)

performance gains above 1000x over matlab spmv can be observed with cuda compatible GPU. (sparse, gpu, spmv)

DD=KBdensity1(qq,tt,KB,nj,Ns)

P=op_accuamarray(indx,nmax)

[gnuradon,gnuiradon,qtXqxy,qxyXqt]=gnufft_init_spmv(Ns,qq...

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updated 1 year ago

spyc: a color-coded version of sparse matrix viewer spy by tryhard

View sparse matrices with matrix entries colored according to relative value and a colormap. (spy, sparse, color)

spyc(sA,cmap,pb);

example_spyc.m

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updated 1 year ago

ispy by Samu

Samu (view profile)

Visualize sparsity pattern and the size of the elements of a matrix. (spy, ispy, sparse)

ispy(A,sizeMultiplier)

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updated 1 year ago

Null space for sparse matrix by Martin Holters

Computes a null space basis, similar to null, but exploiting sparsity. (null space, sparse)

nulls(A, thresh)

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updated almost 2 years ago

Bregman Cookbook by Jerome Gilles

Jerome Gilles (view profile)

This toolbox provides signal/image/3D processing based on Bregman Iterations (bregman, l1, sparse)

R=AddCurveletArray(A,B)

R=AddFrameletArray(A,B)

R=ShrinkComplexCurvelet(A,tau)

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updated 2 years ago

Sparse matrix convolution by Bruno Luong

Bruno Luong (view profile)

Convolution of sparse matrices (convolution, sparse)

sconv2(A, B, shape)

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updated 2 years ago

SPARSECLEAN - Efficiently cleans a sparse matrix of small values or nan by James Tursa

James Tursa (view profile)

SPARSECLEAN cleans a double sparse matrix of small or nan values or values within a range. (sparse, clean, nan)

sparseclean(varargin)

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updated 2 years ago

N-dimensional sparse arrays by Matt J

Matt J (view profile)

Creates an N-dimensional sparse array object, for arbitrary N. (sparse, ndimensional, multidimensional)

varargout=ndstest(TOL)

ndSparse

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updated 2 years ago

K shortest paths in a graph represented by a sparse matrix (Yen's algorithm) by El-ad David Amir

Determine the K shortest paths from node S to node T. (dijkstra, shortestpath, graph)

graphkshortestpaths.m

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updated 2 years ago

CoSaMP and OMP for sparse recovery by Stephen Becker

Stephen Becker (view profile)

Orthogonal Matching Pursuit (OMP) and Compressive Sampling Matched Pursuit (CoSaMP). (omp, cosamp, compressed sensing)

CoSaMP( A, b, k, errFcn, opts )

OMP( A, b, k, errFcn, opts )

test_OMP_and_CoSaMP.m

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updated almost 3 years ago

N-dimensional Sparse Matrices by Jonathan Karr

Jonathan Karr (view profile)

N-dimensional sparse matrix and circular sparse matrix classes for arbitrary N. (sparse, circular, matrix)

edu.stanford.covert.util.CircularSparseMat

edu.stanford.covert.util.CircularSparseMat_Test

edu.stanford.covert.util.SparseMat

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updated 4 years ago

Inversion every 2D slice for arbitrary Multi-dimension array. by Xiaodong

Xiaodong (view profile)

Inverse every 2D slice for an arbitrary N-D array (M). (inversion, inverse, array)

multinv(M)

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updated 4 years ago

SPINIT by Roman

Roman (view profile)

Sparse matrix initialization and update utility. (sparse matrix initial..., sparse, matrix)

spinit(I, J, sz)

make.m

test.m

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updated 4 years ago

HistConnect by Dirk-Jan Kroon

Dirk-Jan Kroon (view profile)

Smooth histograms for sparse sampled signals and images, using low-frequency assumption. (histogram, hist, linear interpolation)

H=HistConnect(X,B,R)

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updated 4 years ago

Sparse sub access by Bruno Luong

Bruno Luong (view profile)

This package allows to retrieve and assign values of sparse matrix in one shot. (sparse, matrix, large size)

asgn(a1, a2)

build_spidxmex

defaultTref

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updated 4 years ago

Robust Sparse data types by Matt J

Matt J (view profile)

Creates sparse array like MATLAB's built-in sparse type, but robust to certain bugs/errors. (sparse, patch, bug)

asgn(a1, a2)

defaultTref

defaultTref

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updated almost 5 years ago

Sparse null space and orthogonal by Bruno Luong

Bruno Luong (view profile)

NULL space and ORTHOGONAL basis for sparse matrix (sparse, matrix, linear algebra)

spnull(S, varargin)

sporth(S)

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updated 5 years ago

Sparsity pattern by Pascal Schulthess

Apply sparsity pattern of one matrix to another. (sparse)

sppattern.m

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updated 5 years ago

SparsePack by Sebastiaan

Packs a sparse matrix into a single uint8 array, reducing memory usage. (sparse, compression)

testSparsePack(NumTests, MemLim, Fake32)

SparsePack.m

SparseUnPack.m

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updated 5 years ago

mexSparseLogical0Diag by Guy

Guy (view profile)

Change all the elements on the main diagonal of a logical sparse matrix to 0. (mex, sparse, logical)

mexLogicalSparse0Diag(A)

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updated almost 6 years ago

SmartInv by Rouzaud Denis

Large sparse matrix inversion. Returns block diagonal, tridiagonal or pentadiagonal elements. (large matrix, sparse, inversion)

smartinv(varargin)

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updated almost 6 years ago

Sparse Field Methods for Active Contours by Shawn Lankton

Shawn Lankton (view profile)

Very fast implementation of level sets. 2D and 3D support, written in C++/MEX with MATLAB wrapper. (computer vision, segmentation, active contours)

sfm_chanvese(img,mask,iterations,lam)

compile_sfm_chanvese.m

sfm_chanvese_demo.m

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updated almost 7 years ago

Fortran mxCreateLogicalSparseMatrix by James Tursa

James Tursa (view profile)

The Fortran version of the mxCreateSparseLogicalMatrix function for mex and engine apps (external interface, mex, logical)

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updated 7 years ago

spyx.m by Carlos Adrian Vargas Aguilera

Same as SPY function but with user defined axes. (data exploration, spy, sparse)

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updated 7 years ago

Sparse grid quadrature by Greg von Winckel

Computes the nodes and weights for a sparse grid on a hyperrectangle (integration, sparse, quadrature)

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updated 7 years ago

fulltosparse (Fortran version) by James Tursa

James Tursa (view profile)

This is a Fortran version of The Mathworks supplied fulltosparse.c, with realloc capability. (external interface, fulltosparse, sparse)

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updated 8 years ago

Spardat2SSD by Skynet

Skynet (view profile)

Convert a data file from spardat to SSD format. (data import, data export, conversion)

spardat2ssd(FileIn,FileOut,DataType,DispInterval)

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updated 8 years ago

matrixop by David Gleich

David Gleich (view profile)

A Matlab object that acts just like a matrix but represents a linear operator as a function. (linear algebra, matrix, class)

Computing Ritz values with the matrixop class

Representing a sparse operator

matrixop interop with Matlab functions

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updated 8 years ago

Sparse Toeplitz matrix construction by Toby Driscoll

Toby Driscoll (view profile)

Produces a sparse Toeplitz matrix given only the first row and column, like built-in Toeplitz. (linear algebra, sparse, toeplitz)

sptoeplitz(col,row)

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updated 9 years ago

Fast sparse matrix vector product by Darren Engwirda

Darren Engwirda (view profile)

sparse matrix vector product (linear algebra, sparse, matrix)

smvp

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updated 9 years ago

Sparse Matrix Multiplication by Christian Walder

Allows you to specify the maximum number of nonzeros before multiplying sparse matrices. (linear algebra, sparse, multiply)

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updated 11 years ago

Fast Pentadiagonal System Solver by Greg von Winckel

Greg von Winckel (view profile)

Solves symmetric and asymmetric pentadiagonal systems. (linear algebra, pentadiagonal, 5band)

x=pentsolve(A,b)

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updated 11 years ago

spy2.m by Rasmus Anthin

Rasmus Anthin (view profile)

With this you can easier se the element locations of matrices. (specialized, plotting, spy)

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updated 13 years ago

Sparseconv by G. Cuypers

A fast convolution for one or more sparse vectors (linear algebra, sparse, convulution)

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