Computer Programs
NESC0709 NIXLIN
last modified: 17-SEP-1980 | catalog | categories | new | search |

NESC0709 NIXLIN

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

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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.