FI (version 1.0)

volume: Estimates the stem volume

Description

volume uses one of the following methods (Smalian, Newton, Huber) to approximate real stem volume. Users should remember they're just approximations and sample size provide more accurate results them using different methods.

Usage

volume(trees, method = "smalian")

Arguments

trees

a data frame or matrix in format described in dataset inventory (more help inventory)

method

method used for estimation of the stem volume

Value

a named vector of volumes, names are defined as same as in first column

References

http://wiki.awf.forst.uni-goettingen.de/wiki/index.php/Stem_volume

See Also

ff sf

Examples

example_data <- data.frame(tree_number = 1,
                           dhb = 5,
                           total_height = 20,
                           comercial_height = 15,
                           section_height = c(0,5,15),
                           section_diameter = 5
                           )
volume(example_data)
#
#
# A little more complex and common example
data(inventory)
volume_output <- volume(inventory)
summary(volume_output)
hist(volume_output)