The AUC values are computed by approximation using the area of the polygons formed under the ROC curve.
A numeric vector with the predictions of the model. Values must range between 0 and 1.
An integer vector with the labels (truth). Values should be either 0 or 1.
Integer. Number of cutoffs to use for computing the rates and AUC.
Logical. When TRUE
, 9 is treated as NA
.
An object of class aphylo_auc
.
Further arguments passed to the method.
Ignored.
A list:
tpr
A vector of length nc
with the True Positive Rates.
tnr
A vector of length nc
with the True Negative Rates.
fpr
A vector of length nc
with the False Positive Rates.
fnr
A vector of length nc
with the False Negative Rates.
auc
A numeric value. Area Under the Curve.
cutoffs
A vector of length nc
with the cutoffs used.
set.seed(8381)
x <- rdrop_annotations(raphylo(50), .3)
ans <- aphylo_mcmc(x ~ mu_d + mu_s + Pi)
#> Warning: While using multiple chains, a single initial point has been passed via `initial`: c(0.9, 0.5, 0.1, 0.05, 0.5). The values will be recycled. Ideally you would want to start each chain from different locations.
#> Convergence has been reached with 10000 steps. Gelman-Rubin's R: 1.0312. (500 final count of samples).
ans_auc <- auc(predict(ans, loo = TRUE), x[,1,drop=TRUE])
print(ans_auc)
#> Number of observations : 35
#> Area Under The Curve (AUC) : 0.95
#> Rates can be accessed via the $ operator.
plot(ans_auc)