Matrix properties
number of rows	4,472
number of columns	936
nonzeros	37,056
structural full rank?	yes
structural rank	936
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	0%
numeric value symmetry	0%
type	real
structure	rectangular
Cholesky candidate?	no
positive definite?	no

author	B. Luong
editor	T. Davis
date	2008
kind	computer graphics/vision problem
2D/3D problem?	yes

Additional fields	size and type
b	full 4472-by-1

Notes:

Photogrammetry problem from Bruno Luong, FOGALE nanotech, France.
This problem is nearly rank-deficient.                           

Ordering statistics:	result
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	700,841
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	61,250

SVD-based statistics:
norm(A)	0.000283389
min(svd(A))	2.11626e-12
cond(A)	1.33911e+08
rank(A)	936
sprank(A)-rank(A)	0
null space dimension	0
full numerical rank?	yes

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.