VBEstimatorPackage:

Description Usage Arguments Value Examples

View source: R/LKest.R

This function allows you to estimates the growth rate K and the theoretical maximum size Linf from a dataset made of Age and length measurements using teh method described in Kimura D.K.,(1980) Likelihood methods for the von Bertalanffy growth curve. Fishery Bulletin 77: 765<e2><80><93>776.

1	LKest(Length, Age, plotVBGF, t0_estim, na.rm, boot, boundary)

`Length`	a vector comtaining the length measurements
`Age`	a vector comtaining the age measurements
`plotVBGF`	if `TRUE` plot of the VB model, `FALSE` does not provide a plot
`t0_estim`	the value of t0 for the model (0 if no better guess is usual)
`na.rm`	if `TRUE` remove NA in the first and second arguments, `FALSE` else
`boot`	if `TRUE` plot 1000 parameters estimations value issued through a boostrap procedure (the corresponding 95 percent confidence interval is plotted as a dotted line)
`boundary`	if `TRUE`, value of K bounded between 0 and 1

A list containing (i) the Von Bertalanffy growth curve fitted values, (ii) the Von Bertalanffy growth curve parameters , (iii) the confidence interval fitted values obtained using the appraoch described in Kimura (1980), (iv) the estimated Von Bertalanffy parameters using the approach described in Kimura (1980), and (v) the r-squared value.