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:	result
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	30,077
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	10,270

SVD-based statistics:
norm(A)	10.2951
min(svd(A))	3.5996e-47
cond(A)	2.86006e+47
rank(A)	171
sprank(A)-rank(A)	49
null space dimension	179
full numerical rank?	no
singular value gap	1.18709e+13

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.