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我有以下代碼繪製ROC曲線。無法使用ggplot繪製AUC
from sklearn.datasets import make_classification
from sklearn.linear_model import LogisticRegression
from sklearn import metrics
from ggplot import *
import pandas as pd
X, y = make_classification(n_samples=10000,n_features=10,n_classes=2, n_informative=4)
X_train = X[:9000]
X_test = X[9000:]
y_train = y[:9000]
y_test = y[9000:]
clf = LogisticRegression()
clf.fit(X_train,y_train)
preds = clf.predict_proba(X_test)[:,1]
fpr, tpr, _ = metrics.roc_curve(y_test,preds)
df = pd.DataFrame(dict(fpr=fpr,tpr=tpr))
ggplot(df, aes(x='fpr', y='tpr')) +\
geom_line() +\
geom_abline(linetype='dashed')
auc = metrics.auc(fpr, tpr)
ggplot(df, aes(x='fpr', ymin=0, ymax='tpr')) +\
geom_area(alpha=0.2) +\
geom_line(aes(y='tpr')) +\
ggtitle("ROC Curve w/ AUC=%s" % str(auc))
但是,在第二行中,它拋出了一個錯誤:「'int'對象不可迭代」。任何人都可以幫我解決這個問題,因爲我不明白。