Module F03AFF in NAG

• NAG Information

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

F03AFF

 
Decomposes a real matrix into triangular factor matrices LU by Crout's method and
evaluates the determinant.
 
Classes  :  D2a1 . Solution of systems of linear equations, including matrix
                 inverses, and LU and related factorizations (general real
                 nonsymmetric matrices)
            D3a1 . Determinants of general real nonsymmetric matrices
 
Type     : Fortran subroutine in NAG library (F03 sublibrary).
Access   : Proprietary. Many implementations available.
Precision: Double.
 
Usage    : CALL F03AFF (N, EPS, A, IA, D1, ID, P, IFAIL)
 
Details  : Documentation Example Example-input Example-output
Sites    : (1) AIX (2) ITL
 

Implementation of F03AFF 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/F03/f03aff_fl19.pdf
   Example      : cat
                  /itl/apps/naglib-19/flib619da/examples/source/f03affe.f
   Example-input: cat
                  /itl/apps/naglib-19/flib619da/examples/data/f03affe.d
   Example-outpu: cat
                  /itl/apps/naglib-19/flib619da/examples/results/f03affe.r
 

Implementation of F03AFF 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/F03/f03aff_fl19.pdf
   Example      : cat
                  /itl/apps/naglib-19/flib619da/examples/source/f03affe.f
   Example-input: cat
                  /itl/apps/naglib-19/flib619da/examples/data/f03affe.d
   Example-outpu: cat
                  /itl/apps/naglib-19/flib619da/examples/results/f03affe.r