• UF Sparse Matrix Collection
  • Matrix group: LPnetlib
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  • Matrix: LPnetlib/lp_czprob
  • Description: Netlib LP problem czprob: minimize c'*x, where Ax=b, lo<=x<=hi
  • download as a MATLAB mat-file, file size: 32 KB. Use UFget(614) or UFget('LPnetlib/lp_czprob') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    LPnetlib/lp_czprob

    dmperm of LPnetlib/lp_czprob

    scc of LPnetlib/lp_czprob

    Matrix properties
    number of rows929
    number of columns3,562
    nonzeros10,708
    structural full rank?yes
    structural rank929
    # of blocks from dmperm193
    # strongly connected comp.5
    entries not in dmperm blocks376
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typereal
    structurerectangular
    Cholesky candidate?no
    positive definite?no

    authorJ. Reid
    editorD. Gay
    date
    kindlinear programming problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 929-by-1
    cfull 3562-by-1
    lofull 3562-by-1
    hifull 3562-by-1
    z0full 1-by-1

    Notes:

    A Netlib LP problem, in lp/data.  For more information                    
send email to netlib@ornl.gov with the message:                           
                                                                          
	 send index from lp                                                      
	 send readme from lp/data                                                
                                                                          
The following are relevant excerpts from lp/data/readme (by David M. Gay):
                                                                          
The column and nonzero counts in the PROBLEM SUMMARY TABLE below exclude  
slack and surplus columns and the right-hand side vector, but include     
the cost row.  We have omitted other free rows and all but the first      
right-hand side vector, as noted below.  The byte count is for the        
MPS compressed file; it includes a newline character at the end of each   
line.  These files start with a blank initial line intended to prevent    
mail programs from discarding any of the data.  The BR column indicates   
whether a problem has bounds or ranges:  B stands for "has bounds", R     
for "has ranges".  The BOUND-TYPE TABLE below shows the bound types       
present in those problems that have bounds.                               
                                                                          
The optimal value is from MINOS version 5.3 (of Sept. 1988)               
running on a VAX with default options.                                    
                                                                          
                       PROBLEM SUMMARY TABLE                              
                                                                          
Name       Rows   Cols   Nonzeros    Bytes  BR      Optimal Value         
CZPROB      930   3523    14173      92202  B     2.1851966989E+06        
                                                                          
         BOUND-TYPE TABLE                                                 
CZPROB           FX                                                       
                                                                          
From John Reid.  Previously named "GUB".

    Ordering statistics:AMD METIS DMPERM+
    nnz(V) for QR, upper bound nnz(L) for LU71,968 67,067 63,584
    nnz(R) for QR, upper bound nnz(U) for LU8,415 8,419 8,418

    Maintained by Tim Davis, last updated 05-Mar-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.