Forest Estimations and Dendrometric Computations
Extract AIC
Angle - Slope conversion and Principal Measure determination
Bark factor The bark factor (k) is computed for trees in order to asse...
Individual Basal Area and DBH (diameter)
The basal area of plots
Basal area contribution
Recursive function for creating nested data structures
Extract BIC
Index of Blackman
Compute Confidence Bands Using Parametric Bootstrap
Compute Confidence Bands Using Delta Method
Extract Model Coefficients
Confidence Intervals for Parameters
Create Objective Function for MPS or MLE
Diameter (DBH) and Circumference
The decrease coefficient
Metric scrolling or decay
Degree and Radian
dendrometry: Forest Estimations and Dendrometric Computations
Density of regeneration (efficient version)
Tree density
Mean diameter
Horizontal distance
The three-parameter Weibull Distribution
Making factor vectors
Fibonacci series
Fibonacci series ratio
Unified Parameter Estimation for Probability Distributions
L-Moments Estimation
Method of Moments Estimation
Unified Optimization-based Estimation (MPS and MLE)
Fit and Plot Three-Parameter Weibull Distribution with Confidence Band...
Format Confidence Interval for Inline Display
Format Confidence Interval for Display
Get CDF for Standard and Custom Distributions
Get Default Parameter Bounds
Get Parameter Names for Standard Distributions
Get PDF for Standard and Custom Distributions
Get Starting Values for Parameter Estimation
Girard Form Class Girard Form Class is a form quotient used to estimat...
Index of Green
Height of Tree or any vertical Object
Extract Log-Likelihood
Lorey's mean height
Create nested data subsets
Create nested data structures with optional function application
Optimization Wrapper
Structural parameters for stands
Print Angle
Print Method for Fitted Distributions
Print Slope
The reduction coefficient
Relative Frequency
Sample size
The shape coefficient
Skewness coefficient
Abbreviates a Botanical or Zoological Latin Name into an Eight-charact...
Stack all vectors of a data frame or list
Summary Method for Fitted Distributions
Extract Variance-Covariance Matrix
Tree stem and log Volume
Computation of dendrometric and structural parameters from forest inventory data. The objective is to provide a user-friendly R package for researchers, ecologists, foresters, statisticians, loggers and other persons who deal with forest inventory data. The package includes advanced distribution fitting capabilities with multiple estimation methods (Maximum Likelihood, Maximum Product Spacing with ties correction methods following Cheng & Amin (1983), and Method of Moments) for probability distributions commonly used in forestry. Visualization tools with confidence bands using delta method and parametric bootstrap are provided for three-parameter Weibull distribution fitting to diameter data. Useful conversion of angle value from degree to radian, conversion from angle to slope (in percentage) and their reciprocals as well as principal angle determination are also included. Position and dispersion parameters usually found in forest studies are implemented. The package contains Fibonacci series, its extensions and the Golden Number computation. Useful references are Arcadius Y. J. Akossou, Soufianou Arzouma, Eloi Y. Attakpa, Noël H. Fonton and Kouami Kokou (2013) <doi:10.3390/d5010099>, W. Bonou, R. Glele Kakaï, A.E. Assogbadjo, H.N. Fonton, B. Sinsin (2009) <doi:10.1016/j.foreco.2009.05.032>, R. C. H. Cheng and N. A. K. Amin (1983) <doi:10.1111/j.2517-6161.1983.tb01268.x>, and R. C. H. Cheng and M. A. Stephens (1989) <doi:10.1093/biomet/76.2.385>.