table.stats {verification}R Documentation

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,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.
silent Should warning statements be surpressed.

Value

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

Note

Initially, table.stats was an internal function used by verify for binary events and multi.cont for categorical events. But occassionally, it is nice to use it directly.

Author(s)

Matt Pocernich <pocernic@rap.ucar.edu>

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)

 

[Package verification version 1.31 Index]