popvol {biometrics} | R Documentation |
Population of stand-volume for 400 elements.
Description
A list of elements containing stand-volume (in m^{3}
/ha) values measured
in sample plots. Thus, the population size is 400, and the random variable is
forest volume. The values were digitized from the book of Zohrer (1980).
Usage
data(popvol)
Format
Contains two variables, as follows:
- id
Plot number, or ID.
- vol
Stand volume, in m
^{3}
/ha
Source
Population data of forest volume. Each row represents a plot, and their respective measured standing trees volume. Data from Zhorer (1980).
References
- Zohrer F. 1980. Forstinventur. Ein Leitfaden fur Studium und Praxis. Pareys Studientexte Nr. 26. Parey. Berlin, Germany. 207
Examples
data(popvol)
sum(popvol$vol)
mean(popvol$vol)
hist(popvol$vol)
[Package biometrics version 1.0.1 Index]