Int_E_VOL_AB_HmDm_HT_dHt.f: Int_E_VOL_AB_HmDm_HT_dHt.f

Description

Internal function not usually called by users

Usage

Int_E_VOL_AB_HmDm_HT_dHt.f(
  Hm,
  Dm,
  A = NULL,
  B = NULL,
  iDH = "D",
  mw_HtT,
  sd_HtT,
  par.lme,
  Rfn = list(fn = "sig2"),
  IA = FALSE,
  nGL = 51,
  ...
)

Value

list with expected volume, variance of volume and squared expected value incorporating the uncertainty of height measurement

Arguments

Hm: Numeric vector of stem heights (m) along which diameter measurements were taken for calibration. Can be of length 1. Must be of same length as Dm
Dm: Numeric vector of diameter measurements (cm) taken for calibration. Can be of length 1. Must be of same length as Hm
A: Numeric scalar defining the lower threshold of a stem section for volume estimation. Depends on iDH. If iDH = "D", a diameter (cm), if iDH = "H", a height (m). If NULL, section starts at lowest point.
B: Numeric scalar defining the upper threshold of a stem section for volume estimation. Depends on iDH. If iDH = "D", a diameter (cm), if iDH = "H", a height (m). If NULL, section ends at tip.
iDH: Character scalar. Either "D" or "H". Type of threshold for section volume estimation. See A or B.
mw_HtT: Scalar. Tree height (m)
sd_HtT: Scalar. Standard deviation of stem height. Can be 0 if height was measured without error
par.lme: List of taper model parameters obtained by TapeR_FIT_LME.f
Rfn: list with function name to provide estimated or assumed residual variances for the given measurements, optionally parameters for such functions
IA: Logic scalar. If TRUE, variance calculation of height estimate based on 2-point distribution. If FALSE, variance calculation of height estimate based on Normal approximation.
nGL: Numeric scalar. Number of support points for numerical integration.
...: not currently used

Author

Edgar Kublin

Details

integrating the taper curve considering uncertainty of height measurement