Group NYPA

Group Description 
Rank-deficient least squares problems.  D. Maragal, New York Power Authority

These matrices are both structurally and numerically singular.  The numerical
rank is less than the structural rank (rank(A) < sprank(A) in MATLAB).

Deepak Maragal
New York Power Authority
White Plains, NY
email: Deepak.Maragal at nypa.gov
Displaying all 8 collection matrices
Id Name Group Rows Cols Nonzeros Kind Date Download File
2217 Maragal_8 NYPA 33,212 75,077 1,308,415 Least Squares Problem 2008 MATLAB Rutherford Boeing Matrix Market
1890 Maragal_7 NYPA 46,845 26,564 1,200,537 Least Squares Problem 2008 MATLAB Rutherford Boeing Matrix Market
1889 Maragal_6 NYPA 21,255 10,152 537,694 Least Squares Problem 2008 MATLAB Rutherford Boeing Matrix Market
1888 Maragal_5 NYPA 4,654 3,320 93,091 Least Squares Problem 2008 MATLAB Rutherford Boeing Matrix Market
1887 Maragal_4 NYPA 1,964 1,034 26,719 Least Squares Problem 2008 MATLAB Rutherford Boeing Matrix Market
1886 Maragal_3 NYPA 1,690 860 18,391 Least Squares Problem 2008 MATLAB Rutherford Boeing Matrix Market
1885 Maragal_2 NYPA 555 350 4,357 Least Squares Problem 2008 MATLAB Rutherford Boeing Matrix Market
1884 Maragal_1 NYPA 32 14 234 Least Squares Problem 2008 MATLAB Rutherford Boeing Matrix Market