WACS: WACS: Multivariate Weather-state Approach Conditionally...

In WACS: Multivariate Weather-State Approach Conditionally Skew-Normal Generator

WACS: Multivariate Weather-state Approach Conditionally Skew-normal Generator

Description

WACS is a multivariate weather generator for daily climate variables based on weather-states that uses a Markov chain for modeling the succession of weather states. Conditionally to the weather states, the multivariate variables are modeled using the family of Complete Skew-Normal distributions. Parameters are estimated on measured series. Must include a 'Rain' variable and can accept as many other variables as desired.

WACS functions

WACSdata:

Builds a data structure compatible with WACS functions

WACSestim:

Estimation of the parameters of a WACS model

WACSsimul:

Performs simulations based on estimated parameters of the WACS model

WACSvalid:

Performs validations of WACS simulations

WACScompare:

Performs comparisons between two WACS data structures, or between two WACS simulation series

WACSplot:

Plots validation figures from WACSvalid and from WACScompare

WACSplotdensity:

Plots fitted bivariate densities of residuals

Authors

Denis Allard, Ronan Trépos

References

Flecher C., Naveau P., Allard D., Brisson N. (2010) A stochastic weather generator for skewed data. Water Resource Research, 46, W07519. Allard D. (2015) WACSgen: model, methods and algorithms. Biostatistiques et Processus Spatiaux, INRA, Avignon, France. Available at denis.biosp.org. Flecher, C., Naveau, Ph. and Allard, D. (2009) Estimating the Closed Skew-Normal distributions parameters using weighted moments. Statistics and Probability Letters, 79, 1977-1984.

Author(s)

Maintainer: Denis Allard [e-mail] (ORCID)

Authors:

• Ronan Trepos [e-mail] (ORCID)

See Also

Useful links:

• https://forge.inrae.fr/rtrepos/weathergen

• Report bugs at https://forge.inrae.fr/rtrepos/weathergen/-/issues

Examples

## Not run:  
  data(ClimateSeries)
  ThisData = WACSdata(ClimateSeries, from="1995-01-01", to="2012-12-31")
  ThisPar  = WACSestim(ThisData)
  ThisSim  = WACSsimul(ThisPar, from="1995-01-01", to="2012-12-31")
  ThisVal  = WACSvalid(what="Sim",wacsdata = ThisData, wacspar = ThisPar, 
                       wacssimul = ThisSim,varname="tmin")
  WACSplot(ThisVal,file="ThisFile.pdf")

## End(Not run)

WACS documentation built on May 29, 2026, 9:07 a.m.