afc (version 1.4.0)

afc.mc: 2AFC For Ordinal Polychotomous Observations And Continuous Forecasts

Description

Routine to calculate the Generalized Discrimination Score (aka Two-Alternatives Forced Choice Score 2AFC) for the situation of polychotomous observations (ordinal) and continuous forecasts

Usage

afc.mc(obsv, fcst, m = 3)

Arguments

obsv

vector with polychotomous observations (values in 1,..,m)

fcst

vector of same length as obsv with real-valued forecasts

m

number of observation categories (default = 3)

Value

p.afc

Value of Generalized Discrimination (2AFC) Score

Details

This routine applies Eq.18 of Mason and Weigel (2009) to calculate the 2AFC.

References

S.J. Mason and A.P. Weigel, 2009. A generic verification framework for administrative purposes. Mon. Wea. Rev., 137, 331-349

See Also

afc

Examples

  #Forecasts and observations of Nino-3.4 index
  #Load set of polychotomous observations (4 categories) and continuous forecasts
  data(cnrm.nino34.mc)
  obsv = cnrm.nino34.mc$obsv
  fcst = cnrm.nino34.mc$fcst

  #Calculate skill score
  afc.mc(obsv,fcst,4)

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