growth.dbh: Calculates forest-wide growth in given dbh categories.

In forestgeo/ctfs: Tools for the Analysis of Forest Dynamics

Description

This calculates forest-wide growth in given dbh categories.

Usage

growth.dbh(census1, census2, classbreak = c(10, 100, 300),
  dbhunit = "mm", growthcol = "dbh", err.limit = 4, maxgrow = 75,
  rounddown = FALSE, method = "I", stdev = FALSE, mindbh = 10)

Arguments

census1	The R Analytical Table for a single census, either tree or stem.
census2	The matching R Analytical Table for a later census.
dbhunit	'cm' or 'mm', only used for basal area
growthcol	defines how growth is measured, either 'dbh'or 'agb'(agb=biomass)
err.limit	A number. Numbers such as 10000 are high and will return all measures.
maxgrow	A number. Numbers such as 10000 are high and will return all measures.
rounddown	If TRUE, all dbh < 55 are rounded down to the nearest multiple of 5.
method	Use 'I' to calculate annual dbh increment: (dbh2 - dbh1)/time, or 'E' to calculate the relative growth rate (log(dbh2) - log(dbh1))/time.
stdev	Logical. Default (FALSE) returns confidence limits, otherwise returns the SD in growth rate per group.
mindbh	The minimum diameter above which the counts are done. Trees smaller than mindbh are excluded. If NULL, all living trees are included.

Value

A list of arrays; values are provided for each DBH class.

Examples

## Not run: 
growth.dbh <- growth.eachspp(
  bciex::bci12t5mini, bciex::bci12t6mini,
  classbreak = c(10, 50, 100, 300, 500))

## End(Not run)

forestgeo/ctfs documentation built on May 3, 2019, 6:44 p.m.