Matrix properties
number of rows	1,690
number of columns	860
nonzeros	18,391
structural full rank?	no
structural rank	765
# of blocks from dmperm	35
# strongly connected comp.	11
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 1690-by-1

Notes:

rank deficient (rank(A) < sprank(A) < size(A,2))
rank: 613 sprank: 765 columns: 860              

Ordering statistics:	result
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	380,210
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	286,936

SVD-based statistics:
norm(A)	12.6441
min(svd(A))	8.49015e-47
cond(A)	1.48926e+47
rank(A)	613
sprank(A)-rank(A)	152
null space dimension	247
full numerical rank?	no
singular value gap	3.58349e+12

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.