height.of.X.tallest.trees {sitreeE}

Mean height of X tallest trees

Description

It calculates the mean height of the X tallest trees by grouping variable (e.g. the plot ID)

Usage

height.of.X.tallest.trees(height, uplotID, num.trees)

Arguments

height

A vector with heights

uplotID

A vector with the grouping variable, most often this would be the plot ID.

num.trees

Number of trees used to calculate the mean height.

Value

It returns a data.frame with two columns containing the uplotID and the mean height of the X tallest trees.

Note

This function can be used to calculate the average of the X largest values of any variable grouped by a grouping variable. It is mostly a wrapper for aggregate.

Author(s)

Clara Antón Fernández ([e-mail])

See Also

lorey.height

Examples

library(sitree)
height.of.X.tallest.trees(height = tr$height,
                               uplotID = tr$plot.id, 5)