PresenceAbsence (version 1.1.11)

Kappa: Kappa

Description

Kappa calculates Kappa and (optionally) the associated standard deviation from a confusion matrix.

Usage

Kappa(CMX, st.dev = TRUE)

Value

if st.dev = FALSE, returns: Kappa.

if st.dev = TRUE, returns a dataframe where:

[1,1]	Kappa
[1,2]	Kappa.sd	standard deviation of Kappa

Arguments

CMX

a confusion matrix - output from cmx

st.dev

a logical indicating whether the associated standard deviation should be calculated

Author

Elizabeth Freeman

Details

The Kappa statistic summarizes all the available information in the confusion matrix. Kappa measures the proportion of correctly classified units after accounting for the probability of chance agreement.

See Also

cmx, pcc, sensitivity, specificity, auc

Examples

data(SIM3DATA)

Kappa(cmx(SIM3DATA))

Kappa(cmx(SIM3DATA),st.dev=FALSE)