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Application of growth functions in the prediction of live weight of domestic animals

Author

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  • Dragutin Vincek
  • Gordana Kralik
  • Goran Kušec
  • Kristian Sabo
  • Rudolf Scitovski

Abstract

We consider several most frequently used growth functions with the aim of predicting live weight of domestic animals. Special attention is paid to the possibility of estimating well the saturation level of animal weight and defining life cycle phases based on animal weight. Parameters of the growth function are most often estimated on the basis of measurement data by applying the least squares (LS) principle. These nonlinear optimization problems very often refer to a numerically very demanding and unstable process. In practice, it is also possible that among the data there might appear several measurement errors or poor measurement samples. Such data might lead not only to unreliable, but very often to wrong conclusions. The least absolute deviations (LAD) principle can be successfully applied for the purpose of detecting and minorizing the effect of such data. On the other hand, by using known properties of LAD-approximation it is possible to significantly simplify the minimizing functional, by which parameters of the growth function are estimated. Implementation of two such possibilities is shown in terms of methodology. Copyright Springer-Verlag 2012

Suggested Citation

  • Dragutin Vincek & Gordana Kralik & Goran Kušec & Kristian Sabo & Rudolf Scitovski, 2012. "Application of growth functions in the prediction of live weight of domestic animals," Central European Journal of Operations Research, Springer;Slovak Society for Operations Research;Hungarian Operational Research Society;Czech Society for Operations Research;Österr. Gesellschaft für Operations Research (ÖGOR);Slovenian Society Informatika - Section for Operational Research;Croatian Operational Research Society, vol. 20(4), pages 719-733, December.
    • Handle: RePEc:spr:cejnor:v:20:y:2012:i:4:p:719-733
    DOI: 10.1007/s10100-011-0199-2
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    References listed on IDEAS

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    1. Dodge, Yadolah, 1987. "An introduction to L1-norm based statistical data analysis," Computational Statistics & Data Analysis, Elsevier, vol. 5(4), pages 239-253, September.
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