Module E02GCF in NAG

• NAG Information

• Components
  • Documentation from ITL
  • Example from ITL
  • Example-input from ITL
  • Example-output from ITL

E02GCF

 
Calculates an L-infinity solution to an over-determined system of linear
equations.
 
Classes  :  D9a2 . Chebyshev (L-infinity) solution of singular,
                 overdetermined or underdetermined systems of linear
                 equations without constraints
            L8a2 . Simple linear L-p regression for p different from 2 (e.g.,
                 least absolute value, minimax)
 
Type     : Fortran subroutine in NAG library (E02 sublibrary).
Access   : Proprietary. Many implementations available.
Precision: Double.
 
Usage    : CALL E02GCF (M, N, MDIM, NDIM, A, B, TOL, RELERR, X, RESMAX, IRANK,
           ITER, IFAIL)
 
Details  : Documentation Example Example-input Example-output
Sites    : (1) AIX (2) ITL
 

Implementation of E02GCF from NAG on AIX

 
AIX:       IBM RS6000, National Institute of Standards and Technology (NIST),
           Gaithersburg, MD. Available to NIST staff.
 
Precision: Double.
 
Access available only to NIST staff on internal Unix systems. They may access this
package provided the /itl tree is cross-mounted.
 
   Link         : f77 -o prog prog.f -L/itl/links/generic/lib -lnag
   Documentation: acroread
                  /itl/apps/naglib-19/docs/NAGdoc/fl/pdf/E02/e02gcf_fl19.pdf
   Example      : cat
                  /itl/apps/naglib-19/flib619da/examples/source/e02gcfe.f
   Example-input: cat
                  /itl/apps/naglib-19/flib619da/examples/data/e02gcfe.d
   Example-outpu: cat
                  /itl/apps/naglib-19/flib619da/examples/results/e02gcfe.r
 

Implementation of E02GCF from NAG on ITL

 
ITL:       Unix Workstation Network, National Institute of Standards and
           Technology (NIST), Gaithersburg, MD. Available to NIST staff.
 
Precision: Double.
 
Access available only to NIST staff on internal Unix systems. They may access this
package provided the /itl tree is cross-mounted.
 
   Link         : f77 -o prog prog.f {-lcomplib.sgimath}
                  -L/itl/links/generic/{lib lib32 lib64}{/mips3 /mips4}
                  -lnag
   Documentation: acroread
                  /itl/apps/naglib-19/flib619da/NAGdoc/fl/pdf/E02/e02gcf_fl19.pdf
   Example      : cat
                  /itl/apps/naglib-19/flib619da/examples/source/e02gcfe.f
   Example-input: cat
                  /itl/apps/naglib-19/flib619da/examples/data/e02gcfe.d
   Example-outpu: cat
                  /itl/apps/naglib-19/flib619da/examples/results/e02gcfe.r