| Matrix properties | |
| number of rows | 555 |
| number of columns | 350 |
| nonzeros | 4,357 |
| structural full rank? | no |
| structural rank | 220 |
| # of blocks from dmperm | 13 |
| # strongly connected comp. | 110 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | 0% |
| numeric value symmetry | 0% |
| type | real |
| structure | rectangular |
| Cholesky candidate? | no |
| positive definite? | no |
| author | D. Maragal |
| editor | T. Davis |
| date | 2008 |
| kind | least squares problem |
| 2D/3D problem? | no |
| Additional fields | size and type |
| b | full 555-by-1 |
Notes:
rank deficient (rank(A) < sprank(A) < size(A,2))
rank: 171 sprank: 220 columns: 350
| Ordering statistics: | AMD | METIS |
| nnz(V) for QR, upper bound nnz(L) for LU | 30,077 | 15,110 |
| nnz(R) for QR, upper bound nnz(U) for LU | 10,270 | 9,703 |
Maintained by Tim Davis, last updated 07-May-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.