Tag: matrix

184 Elegant operations on matrix rows and columns 2012-03-16T08:23:45.897

101 Flatten command: matrix as second argument 2012-01-18T06:52:43.287

74 Does Mathematica have advanced indexing? 2012-03-11T20:21:36.643

48 Why does MatrixForm affect calculations? 2012-03-16T19:47:50.670

45 How to visualize/edit a big matrix as a table? 2012-04-03T13:35:24.667

45 Fastest way to calculate matrix of pairwise distances 2013-03-22T19:40:06.107

44 How to enter matrices in block matrix format? 2012-01-26T16:11:57.253

44 How to form a block-diagonal matrix from a list of matrices? 2013-02-18T09:12:12.453

41 What is the most efficient way to add rows and columns to a matrix? 2012-01-18T18:37:24.330

39 Tiling a square 2012-06-14T18:01:18.130

37 eigenvector bug? 2013-08-13T03:41:47.190

34 Longest path in 0/1 matrix 2014-06-21T20:40:01.133

30 How to symbolically do matrix "Block Inversion"? 2012-01-17T21:28:21.207

30 Can (compiled) matrix permanent evaluation be further sped-up? 2013-12-02T18:32:55.807

28 Best way to create symmetric matrices 2012-07-04T20:43:10.990

28 What are the counterparts in Wolfram to left and right division of a matrix in other programming language, e.g. Julia and MATLAB? 2017-12-04T12:32:29.957

27 Cycles of length N in a graph 2012-03-07T23:50:52.003

27 Is there a way to convert an image into a Graph? 2012-06-13T19:40:10.530

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

25 What is the right way to rotate an array? 2012-03-03T00:03:16.867

25 Obtain approximate Hessian using FindMinimum 2012-03-19T19:09:31.010

25 Does Mathematica store hidden information for matrix objects? 2015-05-07T21:17:47.617

23 Add a vector to a list of vectors 2015-09-19T22:02:16.793

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

22 How do I generate the upper triangular indices from a list? 2012-03-25T03:08:28.287

22 Quick Hessian matrix and gradient calculation? 2013-02-14T18:44:12.097

22 How get eigenvectors without phase jump? 2014-06-29T02:22:53.303

22 How do you concatenate matrices? And how do you make block matrices? 2015-11-01T17:39:39.653

21 Why is calling Dot with many arguments so inefficient? 2015-05-13T21:40:42.733

21 Nearest Kronecker Product 2015-08-15T00:25:10.903

21 Fast MATLAB, slow Mathematica: Export a matrix as TSV 2018-04-11T09:17:20.180

20 Graph from binary matrix (not adjacency) respecting the original matrix positions 2014-06-08T18:27:13.200

20 How do I create a triangulated surface from points? 2015-06-17T22:14:47.580

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

20 How to check if a vector is an eigenvector of a matrix using mathematica? 2017-11-27T19:16:35.023

19 How to use "Drop" function to drop matrix' rows and columns in an arbitrary way? 2013-02-26T06:19:08.023

19 Generating an Ulam spiral 2014-06-09T14:17:54.183

19 Efficient way to build a certain square matrix 2014-06-29T19:01:05.380

19 How to subtract the column means from each row of a matrix? 2016-01-07T02:19:15.690

19 Differentiating functions of vectors/matrices? 2017-02-26T19:53:14.660

19 Tracking Eigenvalues Through a Crossing 2018-02-04T20:49:36.410

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

18 Is it possible to substitute tick labels with alternative text? 2012-06-08T15:56:07.527

18 Axis/Angle from rotation matrix 2013-08-06T10:41:49.290

18 Unpacked eigenvectors of complex matrices 2013-11-02T21:00:21.427

17 How to improve this code for exploring large matrices? 2012-03-02T19:00:09.040

17 Decomposing a matrix with polynomial elements into a polynomial with matrix coefficients 2012-06-29T14:25:35.287

17 Compiling LinearSolve[] or creating a compilable procedural version of it 2013-01-14T20:21:50.040

17 Solving a time-dependent Schrödinger equation 2013-03-20T23:31:57.417

17 Block Matrix Algebra with Mathematica 2013-11-26T09:41:21.767

17 Matrix Multiplication in context of row and column vectors 2014-01-13T22:29:33.720

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

17 A quicker than outer 2015-11-26T18:48:48.667

17 How to speed up `RotationMatrix`? 2017-12-03T12:38:51.033

16 Using uniform coloring in MatrixPlot 2012-06-09T16:49:08.263

16 Mathematica for linear algebra course? 2012-09-08T07:19:41.870

16 Badly conditioned matrix (General::luc) 2013-02-16T19:16:08.200

16 Why is my data 10 times slower than random data when doing matrix multiplication 2015-01-09T04:11:08.417

16 Given a large binary matrix, find the largest submatrix containing non-zero elements 2016-02-25T08:50:15.633

15 Non-commutative symbolic linear algebra 2012-04-26T13:36:44.000

15 Correcting a correlation matrix to be positive semidefinite 2012-08-31T02:35:45.357

15 More efficient matrix-vector product 2013-01-15T13:35:23.073

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

15 Division by zero is slow 2014-10-27T22:59:39.510

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

15 more numerically accurate inverse matrix 2015-12-17T04:59:13.353

15 Factorize trigonometric matrices 2017-04-07T19:34:09.320

15 How to solve this matrix equation 2020-01-19T05:43:35.637

14 Why don't * and ^ work as I expected on matrices? 2012-01-24T00:38:48.203

14 How to apply a permutation to a symmetric square matrix? 2012-02-25T16:43:42.420

14 Constructing a symbolic Hermitian matrix 2012-05-13T17:38:54.317

14 How to manipulate gauge theory in Mathematica? 2012-11-28T03:42:20.667

14 How to find the distance of two lists? 2013-09-06T11:51:55.747

14 Extract matrix from a system of linear equations 2013-09-25T23:41:44.643

14 Making Monte Carlo simulation with ParallelTable 2014-03-28T17:45:19.137

14 How to show matrix multiplication step by step? 2014-10-05T15:00:44.323

14 Fastest way to sum the upper triangle 2015-08-06T22:58:45.163

14 Brackets around each item in matrix 2016-02-07T19:14:39.983

14 How to plot a matrix with 3D style 2017-04-25T04:39:40.850

14 Is there a simple and fast way to delete dependent lines of a matrix 2017-06-28T14:43:32.753

14 Convert QR code to a Nonogram puzzle 2018-06-29T23:33:07.373

13 How can I compute the representation matrices of a point group under given basis functions? 2012-09-15T09:44:28.343

13 How do we solve N-Rooks variation using primes? 2012-10-27T02:00:02.560

13 Correct way to remove matrix columns? 2012-12-27T16:27:18.613

13 Eigenvector corresponding to a specific eigenvalue already found earlier 2013-07-09T17:24:07.397

13 Is there a built-in function to find the adjoint of a matrix? 2013-11-28T01:26:10.410

13 Elegantly split a matrix into positive and negative parts? 2013-12-19T21:50:28.410

13 Zero-dimensional matrices 2013-12-28T17:08:13.240

13 Has Mathematica a function to compute the Smith Normal Form? 2014-01-22T16:39:50.207

13 Visualization of matrix transformations 2014-04-19T04:58:15.237

13 Better way to test that a matrix is upper-triangular? 2014-09-19T02:44:49.730

13 How to add a vertical line to a matrix? 2014-09-25T12:11:40.550

13 Compose many Geometric Transformations for 3D Graphics 2014-10-15T22:28:04.983

13 Get Eigensystem to return orthogonal eigenvectors for Hermitian matrix 2015-01-31T15:12:17.040

13 The magic square function 2015-02-03T07:10:22.210

13 Why does partitioning increase Dot execution speed? 2015-05-10T07:39:44.620

13 $\mathbf L\mathbf D\mathbf L^\top$ Cholesky decomposition 2015-05-14T17:42:07.833

13 Why is Mathematica eating a row from QRDecomposition 2015-08-01T03:07:50.173

13 Difficulty using LUDecomposition 2015-08-01T03:31:08.247