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lmfor (version 1.4)

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, modelling of diameter distributions and estimation off stand density using ITD. Several empirical datasets are also included.

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Version

Install

install.packages('lmfor')

Monthly Downloads

264

Version

1.4

License

GPL-2

Maintainer

Lauri Mehtatalo

Last Published

October 22nd, 2019

Functions in lmfor (1.4)

NR

Solve a Nonlinear Equation Using Newton-Raphson algorithm.
plot.hdmod

Diagnostic plot a Height-Diameter model residuals
circle

Plot circles of a specified radius
ddcomp

Evaluate the fit of a tree diameter distribution
updown

Solve a simple equation using a step halving algorithm.
predvol

Individual tree volume functions for Finland
HTest_cps

Estimate forest characteristics of interest in circular plot sampling using a Horvitz--Thompson-like estimator
lmfor-package

Functions of Lauri Mehtatalo
ImputeHeights

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

A whiskers type residual plot
fithd

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

Solve a Systems of Nonlinear Equations Using the Newton's Method
linesplot

A spaghetti plot of grouped data
qqplotHD

Normal QQ-plot of a fitted H-D model
ips

Wood-decaying fungi carried by bark beetle individuals and their mites.
foto

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

Increment core data of Scots pine trees
alsTree

Individual tree characteristics and ALS data
scaleDMean

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

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

Increment core data of Scots pine trees
recweib

Recovery of Weibull parameters of tree diameter distribution using measured stand characteristics
spati2

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

Productivity of stump lifting machines.
plants2

Sapling counts from sample plots of sapling stands in Finland.
HTest

Estimate stand density using a Horvitz--Thompson-like estimator
HD models

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