afc.mm: 2AFC For Ordinal Polychotomous Observations And Ordinal...

In afc: Generalized Discrimination Score

2AFC For Ordinal Polychotomous Observations And Ordinal Polychotomous Forecasts

Description

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

Usage

afc.mm(obsv, fcst, mv = 3, mf = 3, na.rm = FALSE)

Arguments

obsv	vector with polychotomous observations (values in {1,..,mv})
fcst	vector of same length as obsv with polychotomous forecasts (values in {1,..,mf})
mv	number of observation categories (default = 3)
mf	number of forecast categories (default = 3)
na.rm	logical; if TRUE pairs where obsv or fcst is NA are removed before scoring. Default FALSE returns NA if any input contains NA.

Details

This routine applies Eq.14 of Mason and Weigel (2009) to calculate the 2AFC.

Value

p.afc

Value of Generalized Discrimination (2AFC) Score

Author(s)

Andreas Weigel, Federal Office of Meteorology and Climatology, MeteoSwiss, Zurich, Switzerland

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

  data(cnrm.nino34.mm)
  obsv = cnrm.nino34.mm$obsv
  fcst = cnrm.nino34.mm$fcst
  afc.mm(obsv,fcst,4,4)

afc documentation built on Sept. 11, 2026, 9:08 a.m.