Tag: sparse-arrays

57 What are SparseArray Properties? How and when should they be used? 2015-05-18T08:15:37.060

52 A geometric multigrid solver for Mathematica? 2018-05-21T01:07:59.980

35 Complex eigenvalues from a sparse Hermitian matrix 2018-11-18T06:42:12.640

26 Using the Krylov method for Solve: Speeding up a SparseArray calculation 2012-04-18T16:31:16.063

24 Find the eigenvector associated with the smallest eigenvalue, not smallest in magnitude 2014-03-17T03:35:06.683

24 Wrong eigenvalues from a sparse matrix 2018-03-30T13:40:37.777

23 Speeding up generation of block diagonal matrix 2015-11-14T18:35:25.370

20 Efficient way to combine SparseArray objects? 2012-01-19T14:22:01.300

20 Using ReplaceAll on SparseArray 2012-10-28T13:24:51.343

20 LinearSolve and Krylov Method options 2015-05-05T13:04:29.053

20 What are pattern sparse arrays and how do I use them? 2015-09-29T16:15:23.150

20 Sparse Cholesky Decomposition 2015-11-05T13:48:57.383

19 Why won't SparseArray let me store values with the head List? 2014-09-05T14:55:13.793

19 Generate coefficient array from general formula of linear equation system 2019-06-19T07:11:29.583

19 Efficiently defining a SparseArray function 2019-07-08T13:11:36.123

18 How to use SparseArray in CUDA? 2014-09-23T01:09:45.827

17 Adding three integer sparse matrices is very slow. Adding only two is fast 2013-01-20T02:22:44.803

17 Additive SparseArray Assembly 2013-11-21T21:17:53.257

17 Simple Matrix multiplication takes very long 2015-07-09T14:54:23.223

17 Is it OK that SameQ considers expressions identical, although they have different structure? 2016-03-03T04:35:00.400

15 Matrix Rotation 2013-04-06T22:43:39.950

15 Bug with SparseArray selector in Pick 2014-03-27T18:00:55.110

15 Temporal database reconstruction in mathematica 2014-09-29T18:32:22.653

15 Efficient solution of huge sparse linear system 2015-11-15T17:21:51.220

14 Solving "Resistance between two nodes on a grid" problem in Mathematica 2019-03-12T18:28:52.703

13 How to interpret the FullForm of a SparseArray? 2013-01-19T21:29:40.517

12 Analytic determinant of a sparse 25x25 matrix? 2015-08-18T23:02:01.930

12 Something wrong when I apply Derivative on a SparseArray 2016-05-17T02:47:21.900

11 Speeding up construction of simple tridiagonal matrix 2012-10-13T20:17:40.173

11 How to work around Mathematica hanging when showing a large SparseArray? 2013-01-17T18:18:17.213

11 Building sparse array from packed arrays 2014-06-27T22:30:32.050

11 How to convert a sparse matrix to a list of sparse arrays? 2016-02-23T13:11:19.777

11 Why is IdentityMatrix not defined as a SparseArray by default? 2016-06-08T19:28:29.933

11 Why can't I reshape to any dimensions? 2017-10-28T12:25:33.857

11 What are valid settings for the TreatRepeatedEntries sparse array option? 2018-01-21T16:30:54.973

11 Most efficient way to build block / banded SparseArray 2018-02-14T21:24:10.300

11 Fast way to reassemble SparseArrays 2018-06-14T21:45:56.723

11 Set every element to zero in matrix unless it's 1 or 1/2 2019-01-18T14:12:29.913

10 Efficient by-element updates to SparseArrays 2012-01-26T20:52:57.857

10 Sparse convolution of sparse arrays 2012-11-20T11:51:49.587

10 Speed up 4D matrix/array generation 2013-02-18T17:00:37.557

10 Sporadic bugs in multidimensional SparseArray objects 2014-03-08T16:07:21.120

10 SparseArray output triggers "unsafe dynamic content" warning 2015-01-28T19:47:03.833

10 Does LinearSolve know that I gave it a Sparse lower triangular matrix? 2015-10-16T21:48:30.003

10 Possible Bug in LinearSolveFunction with Sparse Vectors 2016-04-10T23:06:13.657

10 Using Cases to pick out entries of a SparseArray 2016-05-03T00:57:39.360

10 Quickly creating a sparse array 2019-02-27T19:43:43.183

10 `Count` for `SparseArray` 2020-05-05T08:14:02.960

9 Exporting a Large Multidimensional Sparse Array 2012-06-14T23:53:43.353

9 Calculating the rank of a huge sparse array 2013-04-10T09:25:07.987

9 Bug in PositiveDefiniteMatrixQ? 2014-06-28T13:52:44.283

9 How can I efficiently ArrayFlatten a matrix of sparse matrices? 2014-08-01T13:33:06.910

9 Replace diagonal elements in sparse matrix 2018-07-20T06:59:38.327

9 Matrix-free Arnoldi method for eigensystems 2019-01-16T18:20:32.453

9 Optimising subdiagonal shift matrix generation time 2019-06-12T11:01:20.597

9 Multiplying two complex SparseArray objects, yielding empty SparseArray crashes kernel 2020-05-27T22:05:23.170

8 How to produce the ILU0 or ILUT as stand-alone procedures on sparse matrices? 2012-06-14T03:40:11.013

8 Approximate minimum degree permutation algorithm in Mathematica 2013-12-11T20:28:55.417

8 Instant kernel crash when using `+=` on `SparseArray` with repeated entries 2015-01-15T01:30:41.777

8 SparseArray: how to efficiently extract/delete many entries? 2019-06-26T13:07:55.423

8 Finding the null space of a large sparse matrix 2019-08-01T00:11:02.910

8 Reusing PARDISO symbolic factorization 2020-04-16T19:33:49.563

8 SparseArray to list of lists (column entries) efficiently? 2020-05-24T22:05:56.063

7 How to create a large sparse block matrix 2013-01-22T10:35:25.300

7 How to relate memory usage with occupied positions of SparseArrays? 2013-05-22T08:17:08.603

7 Opposite function to Normal 2013-12-15T17:37:05.607

7 Possible bug: SparseArray Part assignment loses default value? 2014-07-17T19:59:28.750

7 Elegant method of generating this matrix? 2015-02-12T23:53:06.973

7 Nonzero element positions of a matrix 2016-03-27T23:40:53.140

7 How to find position where a sequence drops off to zero 2016-10-08T17:00:08.457

7 Bug? Strange behaviour of FullSimplify when checking an equality of SparseArray's 2016-11-17T17:17:34.800

7 directly change the background value of a SparseArray? 2016-11-22T22:22:11.057

7 LibraryLink: Create SparseArray directly from row pointers and column indices 2017-10-23T10:05:22.693

7 Generating a (sparse?) array from data 2018-02-28T14:46:11.893

7 Speeding up tensor contractions and multiplication 2019-07-07T07:13:20.977

7 Efficiently calculating matrix exponential of a recursively generated matrix 2019-10-04T23:08:18.937

7 Fastest way to update rows of an array of SparseArrays 2019-10-22T00:30:37.597

7 Memory usage for smallest eigenvalues 2020-04-28T06:50:36.683

7 Efficiently populate sparse matrix with band structure 2020-05-30T06:41:35.677

6 Efficient Dyson series implementation 2014-09-05T10:52:45.833

6 Constructing Tri-Diagonal Matrices 2015-09-01T17:50:00.273

6 How to populate a large sparse array efficiently 2015-09-16T11:43:09.453

6 Adding two SparseArrays produces zeros in the reported "NonzeroValues" 2015-10-17T02:07:41.257

6 Efficiently compute this Table of NullSpace 2016-06-15T19:35:39.097

6 How to export an output matrix obtained in mathematica to a matrix in python with the correct format? 2016-07-15T11:10:12.023

6 Pardiso Linear Solve Method 2016-08-17T00:19:03.117

6 Nonsparse SparseArray crashes the Kernel 2017-02-02T18:59:53.120

6 Multiplying SparseArray by negative number Crashes Kernel 2017-02-07T19:13:22.907

6 Why the sparse array is ill-conditioned? 2017-03-28T13:27:49.637

6 Using sparse matrices when value depends on position 2017-06-23T20:35:49.257

6 Why does SparseArray allow some patterns but not others? 2017-07-25T05:41:06.753

6 Speeding up the matrix exponential computation for sparse matrices 2017-12-30T16:11:54.190

6 Fastest way to drop multiple rows and columns from SparseArrays 2018-05-13T01:58:29.863

6 How to prevent a SparseArray entry from being specified when it coincides with the default value? 2018-06-24T12:36:48.507

6 Efficiently fill sparse matrix involving BSpline 2018-07-02T11:08:53.173

6 How to find k largest element and their position in a matrix? 2018-07-15T07:58:45.843

6 Lowest Magnitude Eigenvalues of Large Sparse Matrices 2019-06-10T17:31:21.593

6 NearestTo causes a kernel crash when applied to a list of SparseArrays 2019-12-27T17:59:32.463

6 Efficient construction of a SparseArray from LIL (list of lists of column entries) 2020-11-20T19:51:59.040