我不知道为什么我的“开始”pred 不能工作。我只是在 pd.to_datetime 上添加了一些编辑,但没有任何效果。我很困惑如何解决这个问题。
这是我的代码
pred = results.get_prediction(start=pd.to_datetime('2018-06-01'), dynamic=False)
pred_ci = pred.conf_int()
ax = y['2015':].plot(label='observed')
pred.predicted_mean.plot(ax=ax, label='One-step ahead Forecast', alpha=.7, figsize=(14, 4))
ax.fill_between(pred_ci.index,
pred_ci.iloc[:, 0],
pred_ci.iloc[:, 1], color='k', alpha=.2)
ax.set_xlabel('Date')
ax.set_ylabel('Retail_sold')
plt.legend()
plt.show()
并且我的错误日志总是引用我的时间格式,我不得不重新采样我的数据,从每日数据到每月数据,然后再开始数据分析和解决数据,但我不知道为什么我的数据不能使用 pd.todatetime 读取。
---------------------------------------------------------------------------
KeyError Traceback (most recent call last)
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item()
KeyError: 1546300800000000000
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last)
/usr/local/lib/python3.6/dist-packages/pandas/core/indexes/base.py in get_loc(self, key, method, tolerance)
2896 try:
-> 2897 return self._engine.get_loc(key)
2898 except KeyError:
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
KeyError: Timestamp('2019-01-01 00:00:00')
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last)
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item()
KeyError: 1546300800000000000
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last)
11 frames
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
KeyError: Timestamp('2019-01-01 00:00:00')
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last)
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
KeyError: Timestamp('2019-01-01 00:00:00')
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last)
/usr/local/lib/python3.6/dist-packages/statsmodels/tsa/base/tsa_model.py in _get_prediction_index(self, start, end, index, silent)
522 start, start_index, start_oos = self._get_index_label_loc(start)
523 except KeyError:
--> 524 raise KeyError('The `start` argument could not be matched to a'
525 ' location related to the index of the data.')
526 if end is None:
KeyError: 'The `start` argument could not be matched to a location related to the index of the data.'
任何人都可以解决我的问题吗?
我使用了 google colab 和 python 3.7
最佳答案
这里的潜在问题是您的数据没有关联频率的索引,因为您的数据跳过了几天(例如从 2016/2/5 到 2016/2/14)。
关于python-3.x - `start` 参数无法与与数据索引相关的位置匹配,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/58580633/