Determining Initial Values for Parameters of a Weibull Model: A Case Study

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The flexibility of a Weibull-type function makes it an appropriate model for describing data with either monotonic decreasing or convex trends. Mathematically simple methodology is developed to obtain parameter estimates which serve as initial values for nonlinear least squares estimation. These procedures are applied to tree ring increment data and result in models that fit well. Forest Sci. 30:573-581.

Keywords: Weibull distribution; increment data; initial parameter estimates; nonlinear least squares

Document Type: Journal Article

Affiliations: Departments of Forestry, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706

Publication date: September 1, 1984

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