startingPoint2tanchor: Convert FiSAT's starting point to t_anchor value

In TropFishR: Tropical Fisheries Analysis

Description

Starting points returned or chosen within FiSAT are not supported in TropFishR. Instead t_anchor takes on the job of anchoring VBGF growth curves on a temporal axis. This function allows to convert FiSAT's starting points to t_anchor values

Usage

startingPoint2tanchor(param, par, startingLength, startingSample)

Arguments

param	list with dates, midLengths, and catch
par	list with growth parameters 'Linf' and 'K' of VBGF
startingLength	starting length as returned by FiSAT, indicating the length within the starting sample cut by a growth curve
startingSample	starting sample as returned by FiSAT, indicating the sample which is cut by a growth curve

Value

list with input elements and estimated t_anchor value

Examples

data(synLFQ5)
lfqNEW <- startingPoint2tanchor(synLFQ5, par = list(Linf = 92, K = 0.37),
   startingLength = 31, startingSample = 4)
lfqRest <- lfqRestructure(lfqNEW, MA = 11)
plot(lfqRest,par=list(Linf=lfqRest$Linf,K=lfqRest$K,t_anchor=lfqRest$t_anchor))

TropFishR documentation built on Oct. 4, 2021, 9:06 a.m.