azp | R Documentation |
Parameters for linear regression model of form Az=exp(p1+p2*log(dbh)+p3*(log(dbh)^2)+p4*dbh). Function returns expected cutting diameter according to species and diameter in breast height (dbh). Parameters taken from source code of BDAT.
azp
A two-dimensional array. rows refer to species, columns to parameter of linear model.
The implemented species are (column=species name): 1=Norway spruce (S-Dt) 2=Norway spruce (N-Dt) 3=Silver fir 4=Scots pine 5=European larch 6=European beech 7=Quercus petraea and robur, possibly rubra
BDAT-Fortran-library
Kublin and Scharnagl, 1988.
data(azp)
dim(azp)
azp[1,] # 1=Norway spruce (S-Dt)
dbh <- 30
exp(azp[1,1]+azp[1,2]*log(dbh)+azp[1,3]*(log(dbh)^2)+azp[1,4]*dbh) # as implemented
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