Matrix: HB/beacxc
Description: U NONSYMMETRIC MATRIX U.S. ECONOMY 1972 -SZYLD-I.E.A.-NYU-
(bipartite graph drawing) |
Matrix properties | |
number of rows | 497 |
number of columns | 506 |
nonzeros | 50,409 |
structural full rank? | no |
structural rank | 449 |
# of blocks from dmperm | 10 |
# strongly connected comp. | 66 |
explicit zero entries | 0 |
nonzero pattern symmetry | 0% |
numeric value symmetry | 0% |
type | real |
structure | rectangular |
Cholesky candidate? | no |
positive definite? | no |
author | D. Szyld |
editor | I. Duff, R. Grimes, J. Lewis |
date | 1982 |
kind | economic problem |
2D/3D problem? | no |
Ordering statistics: | result |
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD | 61,331 |
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD | 87,215 |
SVD-based statistics: | |
norm(A) | 10.6152 |
min(svd(A)) | 0 |
cond(A) | Inf |
rank(A) | 449 |
sprank(A)-rank(A) | 0 |
null space dimension | 48 |
full numerical rank? | no |
singular value gap | 1.08945e+09 |
singular values (MAT file): | click here |
SVD method used: | s = svd (full (A)) ; |
status: | ok |
For a description of the statistics displayed above, click here.
Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.