verification (version 1.41)

table.stats: Verification statistics for a 2 by 2 Contingency Table

Description

Provides a variety of statistics for a data summarized in a 2 by 2 contingency table.

Usage

table.stats(obs, pred, fudge = 0.01, silent = FALSE)

Arguments

obs

Either a vector of contingency table counts, a vector of binary observations, or a 2 by 2 matrix in the form of a contingency table. (See note below.)

pred

Either null or a vector of binary forecasts.

fudge

A numeric fudge factor to be added to each cell of the contingency table in order to avoid division by zero.

silent

Should warning statements be surpressed.

Value

• tab.out
  Contingency table
• TS
  Threat score a.k.a. Critical success index (CSI)
• TS.se
  Standard Error for TS
• POD
  Hit Rate aka probability of detection
• POD.se
  Standard Error for POD
• M
  Miss rate
• F
  False Alarm RATE
• F.se
  Standard Error for F
• FAR
  False Alarm RATIO
• FAR.se
  Standard Error for FAR
• HSS
  Heidke Skill Score
• HSS.se
  Standard Error for HSS
• PSS
  Peirce Skill Score
• PSS.se
  Standard Error for PSS
• KSS
  Kuiper's Skill Score
• PC
  Percent correct - events along the diagonal.
• PC.se
  Standard Error for PC
• BIAS
  Bias
• ETS
  Equitable Threat Score
• ETS.se
  Standard Error for ETS
• theta
  Odds Ratio
• log.theta
  Log Odds Ratio
• LOR.se
  Standard Error for Log Odds Ratio
• n.h
  Degrees of freedom for log.theta
• orss
  Odds ratio skill score, aka Yules's Q
• ORSS.se
  Standard Error for Odds ratio skill score
• eds
  Extreme Dependency Score
• esd.se
  Standard Error for EDS
• seds
  Symmetric Extreme Dependency Score
• seds.se
  Standard Error for Symmetric Extreme Dependency Score
• EDI
  Extreme Dependency Index
• EDI.se
  Standard Error for EDI
• SEDI
  Symmetric EDI
• SEDI.se
  Standard Error for SEDI

References

Jolliffe, I.T. and D.B. Stephenson (2003). Forecast verification: a practitioner's guide in atmospheric science. John Wiley and Sons. See chapter 3 concerning categorical events.

Stephenson, D.B. (2000). "Use of `Odds Ratio for Diagnosing Forecast Skill." Weather and Forecasting 15 221-232.

Hogan, R.J., O'Connor E.J. and Illingworth, 2009. "Verification of cloud-fraction forecasts." Q.J.R. Meteorol. Soc. 135, 1494-1511.

See Also

verify and multi.cont

Examples

DAT<- matrix(c(28, 23, 72, 2680 ), ncol = 2) ## Finley
table.stats(DAT)