Inflection and stability points of diphasic logistic analysis of growth

Mischan, Martha Maria; Passos, José Raimundo de Souza; Pinho, Sheila Zambello de; Carvalho, Lídia Raquel de

Mischan, Martha Maria; Passos, José Raimundo de Souza; Pinho, Sheila Zambello de; Carvalho, Lídia Raquel de.

Afiliação

Mischan, Martha Maria; São Paulo State University. Botucatu. Brazil
Passos, José Raimundo de Souza; São Paulo State University. Botucatu. Brazil
Pinho, Sheila Zambello de; São Paulo State University. Botucatu. Brazil
Carvalho, Lídia Raquel de; São Paulo State University. Botucatu. Brazil

Sci. agric. ; 72(3): 215-220, May-June 2015. tab, graf

Article em En | VETINDEX | ID: vti-30088

Biblioteca responsável: BR68.1

Localização: BR68.1

ABSTRACT

ABSTRACT

Growth functions with inflection points following a diphasic model, can be adjusted by two approaches using segmented regression or the sum of two functions. In both cases, there are two functions, one for each phase, with inflection and stability points. However, when they are summed, the result is a new function and the points of inflection and stability are different from those obtained from using each function individually. A method to determine these points in a diphasic logistics sum of functions is suggested and the results obtained from fitting the models to eucalyptus growth data showed a better fit of the logistic diphasic sum as compared with segmented regression and monophasic logistic models.(AU)

Assuntos

Dinâmica não Linear; Análise de Regressão; Modelos Logísticos

Palavras-chave

Nonlinear models; Segmented regression; Sum of logistics

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Texto completo: 1 Base de dados: VETINDEX Assunto principal: Modelos Logísticos / Análise de Regressão / Dinâmica não Linear Idioma: En Revista: Sci. agric / Sci. agric. Ano de publicação: 2015 Tipo de documento: Article

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