spati2

A dataset of Scots pine tree heights and diameters. 
The trees were collected on 56 fixed-area sample plots. This is a subset of the larger data set <code>spati</code>.

 datasets

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.

Lauri Mehtatalo

lmfor

Functions for Forest Biometrics

spati2 function

A data frame with 1678 observations on the following 3 variables.<dl>
 <dt><code>plot</code></dt>
<dd>A unique sample plot id.</dd> <dt><code>d</code></dt>
<dd>Tree diameter at breast height (1.3 meters above the ground) in cm.</dd> <dt><code>h</code></dt>
<dd>Tree height, m.</dd> <dt><code>n</code></dt>
<dd>The total number of trees on the plot.</dd> <dt><code>dvar</code></dt>
<dd>The variance of tree diameters on the plot.</dd> <dt><code>dmean</code></dt>
<dd>The mean of tree diameters on the plot.</dd> 
</dl>

Format

The data were collected by Timo Pukkala.

Author

Heights and diameters of Scots pine trees in Ilomantsi, Finland. — spati2

A data frame with 1678 observations on the following 3 variables.<dl>
 <dt><code>plot</code></dt>
<dd>A unique sample plot id.</dd>

 <dt><code>d</code></dt>
<dd>Tree diameter at breast height (1.3 meters above the ground) in cm.</dd>

 <dt><code>h</code></dt>
<dd>Tree height, m.</dd>

 <dt><code>n</code></dt>
<dd>The total number of trees on the plot.</dd>

 <dt><code>dvar</code></dt>
<dd>The variance of tree diameters on the plot.</dd>

 <dt><code>dmean</code></dt>
<dd>The mean of tree diameters on the plot.</dd>

 
</dl>

spati2: Heights and diameters of Scots pine trees in Ilomantsi, Finland.

Description

Usage

Arguments

Format

Author

References

Examples