GHS_psdef/wathen120
Gould,Higham,Scott: matrix from Andy Wathen, Oxford Univ.
| Name |
wathen120 |
| Group |
GHS_psdef |
| Matrix ID |
1289 |
|
Num Rows
|
36,441 |
|
Num Cols
|
36,441 |
|
Nonzeros
|
565,761 |
|
Pattern Entries
|
565,761 |
|
Kind
|
Random 2D/3D Problem |
|
Symmetric
|
Yes |
|
Date
|
2004 |
|
Author
|
A. Wathen |
|
Editor
|
N. Gould, Y. Hu, J. Scott |
| Structural Rank |
36,441 |
| Structural Rank Full |
true |
|
Num Dmperm Blocks
|
1 |
|
Strongly Connect Components
|
1 |
|
Num Explicit Zeros
|
0 |
|
Pattern Symmetry
|
100% |
|
Numeric Symmetry
|
100% |
|
Cholesky Candidate
|
yes |
|
Positive Definite
|
yes |
|
Type
|
real |
| SVD Statistics |
| Matrix Norm |
3.693742e+02 |
| Minimum Singular Value |
1.433371e-01 |
| Condition Number |
2.576962e+03
|
| Rank |
36,441 |
| sprank(A)-rank(A) |
0 |
| Null Space Dimension |
0 |
| Full Numerical Rank? |
yes |
| Download Singular Values |
MATLAB
|
| Download |
MATLAB
Rutherford Boeing
Matrix Market
|
| Notes |
A = gallery('wathen',100,120) ; % (in MATLAB)
To initialize the MATLAB random number generator to replicate
this matrix, first do the following:
rand('state',0); A = gallery('wathen',100,100)
and then generate this matrix using the 100,120 arguments above.
|
