def __init__(self, cm: "metrics.ConfusionMatrix" = None):
self.cm = metrics.ConfusionMatrix() if cm is None else cm
self.accuracy = metrics.Accuracy(cm=self.cm)
self.kappa = metrics.CohenKappa(cm=self.cm)
self.kappa_m = metrics.KappaM(cm=self.cm)
self.kappa_t = metrics.KappaT(cm=self.cm)
self.recall = metrics.Recall(cm=self.cm)
self.micro_recall = metrics.MicroRecall(cm=self.cm)
self.macro_recall = metrics.MacroRecall(cm=self.cm)
self.precision = metrics.Precision(cm=self.cm)
self.micro_precision = metrics.MicroPrecision(cm=self.cm)
self.macro_precision = metrics.MacroPrecision(cm=self.cm)
self.f1 = metrics.F1(cm=self.cm)
self.micro_f1 = metrics.MicroF1(cm=self.cm)
self.macro_f1 = metrics.MacroF1(cm=self.cm)
self.geometric_mean = metrics.GeometricMean(cm=self.cm)
def __init__(self, step, name):
self.name = name
self.optimizer = SynchronousSGD(0.01, name, None)
self.model = compose.Pipeline(
preprocessing.StandardScaler(),
linear_model.LogisticRegression(self.optimizer))
self.metrics = [
metrics.Accuracy(),
metrics.MAE(),
metrics.RMSE(),
metrics.Precision(),
metrics.Recall()
]
self.count = 0
if step is None:
self.step = 50
else:
self.step = int(step)
from river import compose
from river import preprocessing
from river import linear_model
from river import metrics
from river import datasets
from river import optim
optimizer = optim.SGD(0.1)
model = compose.Pipeline(preprocessing.StandardScaler(),
linear_model.LogisticRegression(optimizer))
metric = metrics.ROCAUC()
precision = metrics.Precision()
for x, y in datasets.Phishing():
y_pred = model.predict_proba_one(x)
model.learn_one(x, y)
metric.update(y, y_pred)
precision.update(y, y_pred)
print(metric)
print(precision)
np.random.dirichlet(np.ones(3)).tolist() for _ in range(n)
]
yield y_true, y_pred, sample_weights
if isinstance(metric, base.RegressionMetric):
yield ([random.random() for _ in range(n)],
[random.random() for _ in range(n)], sample_weights)
def partial(f, **kwargs):
return functools.update_wrapper(functools.partial(f, **kwargs), f)
TEST_CASES = [
(metrics.Accuracy(), sk_metrics.accuracy_score),
(metrics.Precision(), sk_metrics.precision_score),
(metrics.MacroPrecision(),
partial(sk_metrics.precision_score, average='macro')),
(metrics.MicroPrecision(),
partial(sk_metrics.precision_score, average='micro')),
(metrics.WeightedPrecision(),
partial(sk_metrics.precision_score, average='weighted')),
(metrics.Recall(), sk_metrics.recall_score),
(metrics.MacroRecall(), partial(sk_metrics.recall_score, average='macro')),
(metrics.MicroRecall(), partial(sk_metrics.recall_score, average='micro')),
(metrics.WeightedRecall(),
partial(sk_metrics.recall_score, average='weighted')),
(metrics.FBeta(beta=.5), partial(sk_metrics.fbeta_score, beta=.5)),
(metrics.MacroFBeta(beta=.5),
partial(sk_metrics.fbeta_score, beta=.5, average='macro')),
(metrics.MicroFBeta(beta=.5),
if isinstance(metric, base.RegressionMetric):
yield (
[random.random() for _ in range(n)],
[random.random() for _ in range(n)],
sample_weights,
)
def partial(f, **kwargs):
return functools.update_wrapper(functools.partial(f, **kwargs), f)
TEST_CASES = [
(metrics.Accuracy(), sk_metrics.accuracy_score),
(metrics.Precision(), partial(sk_metrics.precision_score,
zero_division=0)),
(
metrics.MacroPrecision(),
partial(sk_metrics.precision_score, average="macro", zero_division=0),
),
(
metrics.MicroPrecision(),
partial(sk_metrics.precision_score, average="micro", zero_division=0),
),
(
metrics.WeightedPrecision(),
partial(sk_metrics.precision_score,
average="weighted",
zero_division=0),
),
def __init__(self, beta: float, cm=None, pos_val=True):
super().__init__(cm, pos_val)
self.beta = beta
self.precision = metrics.Precision(self.cm, self.pos_val)
self.recall = metrics.Recall(self.cm, self.pos_val)