pick.dbh {CTFS} | R Documentation |
These functions are called from biomass
. Given the parameter
values provided by biomass
the dbh of tree with a suspect
growth rate is set in order to have a reasonable estimate of the
growth rate. The growth rate estimations can have a very large
effect on the final above ground biomass for the entire site. Use
badgrowth.tree
to generate a file of the trees with
estimated dbh as determined by pick.dbh
.
pick.dbh(census1, census2, badgrowth = "keep", dbhuse = "second", trim = c(-5, 75), recsize = 110, rounddown = FALSE)
census1 |
name dataframe of first census, must be of
same length as census2 |
census2 |
name dataframe of second census, must be of
same length as census1 |
badgrowth |
how to treat growth rates that are determined as
too high or low by trim values. Valid values are: keep
for retaining all growth rates regardless of value, i.e. trim
limits are not applied; nogrowth set growth rates to 0;
meangrowth set growth rate to the mean growth for the dbh
category of the tree; trim set growth values to trim
maximum or minimum if it exceeds or is less than the values for
trim . |
dbhuse |
for trees with “bad” growth, identify which dbh
to trust, then use this dbh to apply the rules selected for
badgrowth.tree . |
trim |
limits of acceptable growth minimum and maximum |
recsize |
the maximum DBH (mmm) a recruit to the second census that is considered appropriate, a very site and species specific value that should be carefully determined by the user. |
rounddown |
rounding rules for the first and second censuses at Pasoh |
This function is only called by calc.neighborhood.sp
and is
used internally.
pick.dbh
returns a list of:
dbh1 |
dbh in census1 as determined by pickdbh |
dbh2 |
dbh in census2 as determined by pickdbh |
GRm |
growth (mm/year) of the main stem |
gr.raw
returns a vector of growth rates without adjustment.
Pamela Hall