Specificity
specificity calculates the specificity and (optionally) the associated standard deviation from a confusion matrix.
specificity(CMX, st.dev = TRUE)
CMX |
a confusion matrix - output from |
st.dev |
a logical indicating whether the associated standard deviation should be calculated |
Specificity is the proportion of observed negatives correctly predicted, and reflects a model's ability to predict an absence given that a species actually does not occur at a location.
if st.dev = FALSE, returns: specificity.
if st.dev = TRUE, returns a dataframe where:
| [1,1] | specificity |
|
| [1,2] | specificity.sd
|
standard deviation of specificity |
Elizabeth Freeman eafreeman@fs.fed.us
cmx, pcc, sensitivity, Kappa, auc
data(SIM3DATA) specificity(cmx(SIM3DATA)) specificity(cmx(SIM3DATA),st.dev=FALSE)
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