Buss/connectus
Website recommendation system, Steven Buss, Univ. Florida
| Name |
connectus |
| Group |
Buss |
| Matrix ID |
2247 |
|
Num Rows
|
512 |
|
Num Cols
|
394,792 |
|
Nonzeros
|
1,127,525 |
|
Pattern Entries
|
1,127,525 |
|
Kind
|
Undirected Bipartite Graph |
|
Symmetric
|
No |
|
Date
|
2009 |
|
Author
|
S. Buss |
|
Editor
|
T. Davis |
| Structural Rank |
458 |
| Structural Rank Full |
false |
|
Num Dmperm Blocks
|
8 |
|
Strongly Connect Components
|
256 |
|
Num Explicit Zeros
|
0 |
|
Pattern Symmetry
|
0% |
|
Numeric Symmetry
|
0% |
|
Cholesky Candidate
|
no |
|
Positive Definite
|
no |
|
Type
|
binary |
| SVD Statistics |
| Matrix Norm |
4.833412e+02 |
| Minimum Singular Value |
0 |
| Condition Number |
Inf
|
| Rank |
456 |
| sprank(A)-rank(A) |
2 |
| Null Space Dimension |
56 |
| Full Numerical Rank? |
no |
| Download Singular Values |
MATLAB
|
| Download |
MATLAB
Rutherford Boeing
Matrix Market
|
| Notes |
This is a matrix from Steven Buss, for a website recommendation system (to
be called www.connectious.com). Each row of the matrix is a unique user.
Eachc olumn of the matrix is a web page. A(i,j)=1 if user i has tagged
web page j as favorable, and a 0 represents no opinion. The data was
obtained from digg.com. Note that the matrix A*A' contains one
connected component of size 342, and 170 singletons (nodes with no edges)
This means that a group of 341 users share some interests, at least
indirectly, and that there are 171 other users that share no interests
at all with any other users (they have no pages in common with anyone).
|
