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Questions tagged
matrix
130 questions · page 3 of 3
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28
votes
2
answers
Numpy image - rotate matrix 270 degrees
python
matrix
image-manipulation
numpy
asked 2010-03-17T10:07:03.267
10
votes
3
answers
How to compute 99% coverage in MATLAB?
matlab
matrix
statistics
percentile
asked 2010-03-05T06:35:31.513
19
votes
6
answers
How can I remove a column from a sparse matrix efficiently?
python
matrix
numpy
scipy
algebra
asked 2010-03-03T03:25:01.327
15
votes
3
answers
How to compute only the diagonal of a matrix product in Octave?
matlab
matrix
octave
matrix-multiplication
diagonal
asked 2010-02-20T04:26:02.960
22
votes
5
answers
Calculate the sum of elements in a matrix efficiently
algorithm
matrix
asked 2010-02-17T01:35:17.903
24
votes
3
answers
Reshape 3d matrix to 2d matrix
matlab
matrix
reshape
asked 2010-02-13T08:16:04.617
23
votes
7
answers
Computing the null space of a matrix as fast as possible
algorithm
math
matrix
cuda
asked 2010-02-02T01:49:35.480
11
votes
6
answers
Randomize matrix in perl, keeping row and column totals the same
perl
random
matrix
asked 2010-01-25T15:26:16.683
22
votes
6
answers
allocate matrix in C
c
pointers
matrix
malloc
asked 2010-01-24T20:43:16.197
32
votes
14
answers
Optimized matrix multiplication in C
c
matrix
asked 2009-12-15T13:45:14.480
9
votes
1
answers
How to divide a matrix into equals parts?
matlab
matrix
asked 2009-11-29T23:40:42.853
37
votes
3
answers
Best way to allocate matrix in R, NULL vs NA?
r
matrix
asked 2009-11-16T23:44:25.373
299
votes
11
answers
What are the most widely used C++ vector/matrix math/linear algebra libraries, and their cost and benefit tradeoffs?
c++
math
matrix
linear-algebra
asked 2009-09-04T16:45:58.510
121
votes
7
answers
How do I make a matrix from a list of vectors in R?
r
matrix
vector
asked 2009-08-25T18:02:36.033
11
votes
4
answers
How to prepend a column to a matrix?
matrix
wolfram-mathematica
asked 2009-08-07T13:46:29.460
12
votes
4
answers
Determining if a matrix is diagonalizable in the R Programming Language
r
matrix
asked 2009-07-25T02:32:27.950
100
votes
10
answers
Very large matrices using Python and NumPy
python
matrix
numpy
asked 2009-06-28T00:32:21.983
14
votes
6
answers
Comparing two matrices in Matlab
matlab
comparison
floating-point
matrix
asked 2009-06-02T07:06:51.380
28
votes
9
answers
Matrix Library for .NET
.net
math
matrix
sparse-matrix
asked 2009-05-08T15:22:20.420
9
votes
2
answers
Turning a binary matrix into a vector of the last nonzero index in a fast, vectorized fashion
matlab
matrix
vector
vectorization
asked 2009-05-06T20:59:14.957
10
votes
4
answers
What's the most efficient/elegant way to delete elements from a matrix in MATLAB?
matlab
matrix
delete-record
asked 2009-03-25T21:15:26.767
17
votes
8
answers
How can I cluster a graph in Python?
python
sorting
matrix
cluster-analysis
graph-theory
asked 2009-03-17T09:21:07.750
53
votes
6
answers
A simple algorithm for generating positive-semidefinite matrices
algorithm
math
matrix
asked 2009-03-06T15:54:10.770
9
votes
3
answers
Matrices of Matrices within Perl
perl
matrix
asked 2009-03-03T22:02:44.280
155
votes
19
answers
Performance of Java matrix math libraries?
java
math
matrix
performance
asked 2009-02-09T19:12:03.783
40
votes
6
answers
Array of Matrices in MATLAB
arrays
matlab
matrix
asked 2009-01-21T20:59:54.537
182
votes
35
answers
Looping in a spiral
algorithm
matrix
loops
spiral
asked 2008-12-29T18:40:29.320
62
votes
7
answers
Python Inverse of a Matrix
python
algorithm
matrix
linear-algebra
matrix-inverse
asked 2008-10-17T05:30:49.997
10
votes
1
answers
How do I get the current size of a matrix stack in OpenGL?
c
opengl
graphics
matrix
asked 2008-09-22T09:43:14.757
616
votes
14
answers
Transpose/Unzip Function (inverse of zip)?
python
list
matrix
transpose
asked 2008-08-21T04:29:07.580
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