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NESC0709 NIXLIN

NIXLIN, Function Minimization Using Direct Search Simplex Method for Nonlinear Equation Fit

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROBLEM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES
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1. NAME OR DESIGNATION OF PROGRAM:  NIXLIN
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2. COMPUTERS
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Program name Package id Status Status date
NIXLIN NESC0709/01 Tested 17-SEP-1980

Machines used:

Package ID Orig. computer Test computer
NESC0709/01 IBM 3033 IBM 3033
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3. DESCRIPTION OF PROBLEM OR FUNCTION

NIXLIN  performs  a  function
minimization by  a direct  search iterative  process that  has the
advantage of requiring no derivative evaluations.  This particular
version is well-suited to fitting nonlinear models to experimental
data  and to  the solution  of systems  of nonlinear  simultaneous
equations.
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4. METHOD OF SOLUTION

The  program  uses  the  Simplex  method  for
function minimization.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The dimensions may
be increased to accommodate larger problems.
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6. TYPICAL RUNNING TIME

Less  than 30  seconds  is  required for  a
typical problem.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS:
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9. STATUS
Package ID Status date Status
NESC0709/01 17-SEP-1980 Tested at NEADB
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10. REFERENCES
NESC0709/01, included references:
J.  A.  Nedler and  R.  Mead:
A Simplex  Method  for Function  Minimization,
Computer  Journal,  Vol.  7, pp.  308-313, 1965
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11. MACHINE REQUIREMENTS

The program requires 240K bytes to compile,
76K bytes to execute.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC0709/01 FORTRAN-IV
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:   OS/360.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHOR

                 L. M. Arnett
                 Savannah River Laboratory
                 E. I. duPont de Nemours and Company, Inc.
                 Aiken, South Carolina  29801
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16. MATERIAL AVAILABLE
NESC0709/01
File name File description Records
NESC0709_01.001 INFORMATION 12
NESC0709_01.002 SOURCE (F4,EBCDIC) 400
NESC0709_01.003 INPUT DATA FOR S.P. 39
NESC0709_01.004 PRINTED OUTPUT OF S.P. 78
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17. CATEGORIES
  • P. General Mathematical and Computing System Routines

Keywords: data processing, least square fit, nonlinear problems.