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lmfor (version 1.2)

Functions for Forest Biometrics

Description

Functions for different purposes related to Forest biometrics, including illustrative graphics, numerical computation, modeling height-diameter relationships, prediction of tree volumes, and modelling of diameter distributions. Datasets on tree height-diameter relationship, light response of moss photosynthesis, and productivity of stump-lifting machines are included.

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Version

Install

install.packages('lmfor')

Monthly Downloads

286

Version

1.2

License

GPL-2

Maintainer

Lauri Mehtatalo

Last Published

January 5th, 2017

Functions in lmfor (1.2)

A whiskers type residual plot

A spaghetti plot of grouped data

Functions of Lauri Mehtatalo

Solve simple equations using Newton-Raphson algorithm.

Fit a Height-Diameter model to forest tree data using functions of package nlme.

Impute missing tree heights into a forest data using a nonlinear (mixed-effects) model.

CO2 exchange of transplanted Sphagnum fuscum moss in a chronosequence of mires.

Evaluate the fit of a tree diameter distribution

Available 2- and 3- parameter H-D model functions to be used by function fithd.

Plot circles of a specified radius

Solve a simple equation using a step halving algorithm.

Diagnostic plot a Height-Diameter model residuals

Solve systems of equations using the Gauss-Newton algorithm

Heights and diameters of Scots pine trees in Ilomantsi, Finland.

Recovery of Weibull parameters of tree diameter distribution using measured stand characteristics

Productivity of stump lifting machines.

Raw sample plot data of Scots pine in Ilomantsi, Finland.

Individual tree volume functions for Finland

Normal QQ-plot of a fitted H-D model

The Weibull scale parameter for the given mean/median diameter and shape parameter.