simGwexModel: simGwexModel

In GWEX: Multi-Site Stochastic Models for Daily Precipitation and Temperature

simGwexModel

Description

Simulate from a GWex model

Usage

simGwexModel(
  objGwexFit,
  nb.rep = 10,
  d.start = as.Date("01011900", "%d%m%Y"),
  d.end = as.Date("31121999", "%d%m%Y"),
  objGwexObs = NULL,
  prob.class = c(0.5, 0.75, 0.9, 0.99),
  objGwexSim = NULL,
  nCluster = 1
)

Arguments

objGwexFit	an object of class GwexFit
nb.rep	number of repetitions of scenarios
d.start	a starting date for the simulation
d.end	an ending date for the simulation
objGwexObs	optional: an object of class GwexObs if we need the observations to simulate (disaggregation prec 3D -> 1D)
prob.class	vector of probabilities indicating class of "similar" mean intensities
objGwexSim	optional: an object of class GwexSim if we need simulations to simulate (temp conditional to prec)
nCluster	optional, number of clusters which can be used for the parallel computation

Value

GwexSim

an object of class GwexSim. Contains sim (3D-array with the simulations) and a vector of dates

Author(s)

Guillaume Evin

Examples

# vector of dates
vecDates = seq(from=as.Date("01/01/2005",format="%d/%m/%Y"),
to=as.Date("31/12/2014",format="%d/%m/%Y"),by='day')

###############################################################
#               FIT AND SIMULATE FROM THE PRECIPITATION MODEL
###############################################################
# Format observations: create a G-Wex object
myObsPrec = GwexObs(variable='Prec',date=vecDates,obs=dailyPrecipGWEX[,1,drop=FALSE])

# Fit GWEX precipitation model, default options except for the threshold th
myParPrec = fitGwexModel(myObsPrec,listOption=list(th=0.5)) # fit model

# Generate 2 scenarios for one year, using the 'GwexFit' object
mySimPrec = simGwexModel(objGwexFit=myParPrec, nb.rep=2, d.start=vecDates[1],
d.end=vecDates[10])
mySimPrec # print object

###############################################################
#     FIT AND SIMULATE FROM THE TEMPERATURE MODEL
###############################################################
# Format observations: create a G-Wex object
myObsTemp = GwexObs(variable='Temp',date=vecDates,obs=dailyTemperGWEX)

# Fit GWEX temperature model
myParTemp = fitGwexModel(myObsTemp,listOption=list(hasTrend=TRUE,typeMargin='Gaussian',
depStation='Gaussian'))

# Generate 2 scenarios for one year, using an existing 'GwexFit' object
mySimTemp = simGwexModel(objGwexFit=myParTemp, nb.rep=2, d.start=vecDates[1], 
                          d.end=vecDates[365],objGwexObs=myObsPrec)
mySimTemp # print object

GWEX documentation built on May 29, 2024, 5:08 a.m.