mcc | R Documentation |
Measure to compare true observed labels with predicted labels in binary classification tasks.
mcc(truth, response, positive, ...)
truth |
( |
response |
( |
positive |
( |
... |
( |
The Matthews Correlation Coefficient is defined as
(TP * TN - FP * FN) / sqrt((TP + FP) * (TP + FN) * (TN + FP) * (TN + FN)).
This above formula is undefined if any of the four sums in the denominator is 0. The denominator is then set to 1.
Performance value as numeric(1)
.
Type: "binary"
Range: [-1, 1]
Minimize: FALSE
Required prediction: response
Matthews BW (1975). “Comparison of the predicted and observed secondary structure of T4 phage lysozyme.” Biochimica et Biophysica Acta (BBA) - Protein Structure, 405(2), 442–451. doi: 10.1016/0005-2795(75)90109-9.
Other Binary Classification Measures:
auc()
,
bbrier()
,
dor()
,
fbeta()
,
fdr()
,
fnr()
,
fn()
,
fomr()
,
fpr()
,
fp()
,
npv()
,
ppv()
,
prauc()
,
tnr()
,
tn()
,
tpr()
,
tp()
set.seed(1) lvls = c("a", "b") truth = factor(sample(lvls, 10, replace = TRUE), levels = lvls) response = factor(sample(lvls, 10, replace = TRUE), levels = lvls) mcc(truth, response, positive = "a")
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