数据挖掘 - Python熊猫索引错误 - 吾爱随笔录

尝试运行此处找到的代码时遇到索引错误。 错误发生在 In[10] 部分：

for n in range(len(dominantTheta)):
    shift = dominantTheta[n]
    regressionDelta += dominantAmp[n] * np.cos(n * np.array(range(len(df))) + shift)

错误信息：

Traceback (most recent call last):
  File "C:/Users/xxx/Desktop/Python Workspace/DSP.py", line 62, in <module>
    shift = dominantTheta[n]
  File "C:\Users\xxx\AppData\Local\Programs\Python\Python36\lib\site-packages\pandas\core\series.py", line 868, in __getitem__
    result = self.index.get_value(self, key)
  File "C:\Users\xxx\AppData\Local\Programs\Python\Python36\lib\site-packages\pandas\core\indexes\base.py", line 4375, in get_value
    tz=getattr(series.dtype, 'tz', None))
  File "pandas\_libs\index.pyx", line 81, in pandas._libs.index.IndexEngine.get_value
  File "pandas\_libs\index.pyx", line 89, in pandas._libs.index.IndexEngine.get_value
  File "pandas\_libs\index.pyx", line 132, in pandas._libs.index.IndexEngine.get_loc
  File "pandas\_libs\hashtable_class_helper.pxi", line 987, in pandas._libs.hashtable.Int64HashTable.get_item
  File "pandas\_libs\hashtable_class_helper.pxi", line 993, in pandas._libs.hashtable.Int64HashTable.get_item
KeyError: 0

我安装了最新版本的 numpy 和 pandas，并使用 Python 3.6