phenology (version 3.40)

par_init: Calculate initial set of parameters.

Description

This function is used to generate a first set of parameters that is expected to be not to far from the final.

Usage

par_init(data = stop("A dataset must be provided"),
    parametersfixed = NA, help = FALSE)

Arguments

data

dataset generated with add_format

parametersfixed

Set of fixed parameters

help

If TRUE, an help is displayed

Value

• The initial set of parameters

Details

par_init calculates initial set of parameters.

Examples

library(phenology)
# Read a file with data
# Gratiot<-read.delim("http://max2.ese.u-psud.fr/epc/conservation/BI/Complete.txt", , header=FALSE)
data(Gratiot)
# Generate a formatted list nammed data_Gratiot
data_Gratiot<-add_format(origin=NULL, add=Gratiot, name="Complete", reference=as.Date("2001-01-01"), format="%d/%m/%Y")
# Generate initial points for the optimisation
parg<-par_init(data_Gratiot, parametersfixed=NULL)
# Run the optimisation
# result_Gratiot<-fit_phenology(data=data_Gratiot, parametersfit=parg, parametersfixed=NULL, trace=1)
data(result_Gratiot)
# Plot the phenology and get some stats
output<-plot_phenology(result=result_Gratiot, pdf=FALSE)