decreaseMetric

The average metric decay expresses the difference, in
centimeters per meter, between the diameter (or circumference) at breast
height and its diameter at mid-height of a stem related to the difference
between the height at mid-height and that at breast height.

Computation of dendrometric and structural
parameters from forest inventory data. The objective is to provide an
user-friendly R package for researchers, ecologists, foresters,
statisticians, loggers and others persons who deal with forest inventory
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>
and W. Bonou, R. Glele Kakaï, A.E. Assogbadjo, H.N. Fonton, B. Sinsin (2009)
<doi:10.1016/j.foreco.2009.05.032> .

Narcisse Yehouenou

dendrometry

Forest Estimations and Dendrometric Computations

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

decreaseMetric function

<dl><dt>dmh</dt>
<dd>numeric, the diameter at middle height in centimeter (cm).</dd>
<dt>dbh</dt>
<dd>numeric, the diameter at breast height in centimeter (cm).</dd>
<dt>mh</dt>
<dd>numeric, the middle (or cut) height in meter (m).</dd>
<dt>bh</dt>
<dd>Either a numeric value standing for the breast height in meter (m)
of all trees or a numeric vector standing for the breast height of each tree.
Default is <code>1.3</code>.</dd></dl>

Arguments

Metric scrolling or decay — decreaseMetric

<dl>

<dt>dmh</dt>
<dd>numeric, the diameter at middle height in centimeter (cm).</dd>


<dt>dbh</dt>
<dd>numeric, the diameter at breast height in centimeter (cm).</dd>


<dt>mh</dt>
<dd>numeric, the middle (or cut) height in meter (m).</dd>


<dt>bh</dt>
<dd>Either a numeric value standing for the breast height in meter (m)
of all trees or a numeric vector standing for the breast height of each tree.
Default is <code>1.3</code>.</dd>

</dl>

decreaseMetric: Metric scrolling or decay

Description

Usage

Value

Arguments

See Also

Examples