我正在尝试使用sklearn版本0.18.1中的TimeSeriesSplit交叉验证策略和LogisticRegression估算器。但是我遇到了一个错误,提示如下:
“cross_val_predict仅适用于分区”
以下代码片段展示了如何重现此问题:
“cross_val_predict仅适用于分区”
以下代码片段展示了如何重现此问题:
from sklearn import linear_model, neighbors
from sklearn.model_selection import train_test_split, cross_val_predict, TimeSeriesSplit, KFold, cross_val_score
import pandas as pd
import numpy as np
from datetime import date, datetime
df = pd.DataFrame(data=np.random.randint(0,10,(100,5)), index=pd.date_range(start=date.today(), periods=100), columns='x1 x2 x3 x4 y'.split())
X, y = df['x1 x2 x3 x4'.split()], df['y']
score = cross_val_score(linear_model.LogisticRegression(fit_intercept=True), X, y, cv=TimeSeriesSplit(n_splits=2))
y_hat = cross_val_predict(linear_model.LogisticRegression(fit_intercept=True), X, y, cv=TimeSeriesSplit(n_splits=2), method='predict_proba')
我做错了什么?