fiberLD (version 0.1-8)

dx.fibers: Density functions of the fiber lengths

Description

Functions to get values of the density functions of the fiber length on three different scales: as observed in the increment core corresponding to cut and uncut fiber lengths in the core (dx.fibers), as true fiber lengths of the fibres that at least partially appear in the increment core (dy.fibers) and as the true fiber lengths in the standing tree (dw.fibers).

Usage

dx.fibers(x, par, r, model="ggamma")
  dy.fibers(x, par, model="ggamma")
  dw.fibers(x, par, r, model="ggamma")

Value

returns a vector of density values

Arguments

x

vector of fiber lengths

par

vector of parameters for fiber length distribution

r

radius of the increment core

model

either ggamma (default) or lognorm

Author

Sara Sjöstedt de Luna, Konrad Abramowicz, Natalya Pya Arnqvist

See Also

dx.mixture, dy.mixture, dw.mixture

Examples

 library(fiberLD)
 r <- 2.5
 par <- c(1.8,2.7,2.6)
 x <- seq(.01, 2*r-.01,length=100)
 f1 <- dy.fibers(x, par)
 plot(x,f1,type="l")

 f2 <- dx.fibers(x, par, r)
 f3 <- dw.fibers(x, par, r)

 ## the same functions can be used for plotting fine densities...
 par.fines <- c(-2, .5)
 x <- seq(0, 2,length=100)
 f1.fines <- dy.fibers(x, par.fines, model="lognorm")
 plot(x,f1.fines,type="l")
 
 ## getting the distribution in the tree that goes beyond the length 
 ## of the diameter, 2r ... 
 w <- seq(0,8,length=200)
 f5 <- dw.fibers(w,par,r) ## fiber density in the tree
 par.fines <- c(.06,1.5,3.3)
 f2.fines <- dw.fibers(w, par.fines,r)
 par(mfrow=c(1,2))
 plot(w,f5,type="l", main="fiber density")
 plot(w,f2.fines,type="l", main="fine density")