Tree

Data frame of 10 rows and 5 columns containing tree measures.

datasets

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>.

Narcisse Yehouenou

dendrometry

Forest Estimations and Dendrometric Computations

Information and Communication Technology for you ONG (ICT4U-ONG) 

Tree function

Data frame with ten observations and five variables:<dl>
 <dt>circum</dt>
<dd>Tree circumference in centimeter (cm).</dd> <dt>dist</dt>
<dd>Horizontal distance between the person measuring angles and
 the tree (m).</dd> <dt>up</dt>
<dd>Angle measured for the top part of the tree in degree (°).
 It is used to calculate the total tree height.</dd> <dt>down</dt>
<dd>Angle measured for the bottom part of the tree in degree (°).</dd> <dt>fut</dt>
<dd>Bole angle measure in degree (°); Bole is where the first branch
 occurs on the trunk. It is used to calculate the merchantable tree height.</dd>
</dl>

Format

Narcisse Yehouenou <a href="/link/narcisstar211%40gmail.com?package=dendrometry&version=0.0.4" data-mini-rdoc="dendrometry::narcisstar211@gmail.com">narcisstar211@gmail.com</a>

Author

Dendrometric measures on tree — Tree

Data frame with ten observations and five variables:<dl>
 <dt>circum</dt>
<dd>Tree circumference in centimeter (cm).</dd>

 <dt>dist</dt>
<dd>Horizontal distance between the person measuring angles and
 the tree (m).</dd>

 <dt>up</dt>
<dd>Angle measured for the top part of the tree in degree (°).
 It is used to calculate the total tree height.</dd>

 <dt>down</dt>
<dd>Angle measured for the bottom part of the tree in degree (°).</dd>

 <dt>fut</dt>
<dd>Bole angle measure in degree (°); Bole is where the first branch
 occurs on the trunk. It is used to calculate the merchantable tree height.</dd>


</dl>

Narcisse Yehouenou <a href='mailto:narcisstar211@gmail.com'>narcisstar211@gmail.com</a>

Tree: Dendrometric measures on tree

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