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我有一個包含供應商和製造商列表的數據集。我想爲每個獨特的供應商和製造商分配一個唯一的編號。我正在使用Python,並且正在執行一些機器學習預測。這是我到目前爲止如何在Python數據集中插入新列
import pandas as pd
import numpy as np
import seaborn as sns
import matplotlib.pyplot as plt
%matplotlib inline
df = pd.read_csv('MasterData030617.csv')
X = df.dropna(axis=0)
numbers= np.unique(X['Supplier'], return_inverse=True)
numbers2 = np.unique(X['Logistics'], return_inverse=True)
現在,這是問題發生的地方。我想採取這些新的列,並添加/插入到我的原始數據集。我認爲以下是正確的做法,但我得到的錯誤: X ['New Supply'] =數字 X ['New Logistics'] = numbers2 其中「New Supply」和「New Logistics」分別是。新列我想補充到的原始數據,當我運行最後兩個命令我得到以下錯誤的名稱: 「
ValueError Traceback (most recent call last)
<ipython-input-18-91f4a141e070> in <module>()
----> 1 X['New Supply'] = numbers
2 X['New Logistics'] = numbers2
//anaconda/lib/python2.7/site-packages/pandas/core/frame.pyc in __setitem__(self, key, value)
2417 else:
2418 # set column
-> 2419 self._set_item(key, value)
2420
2421 def _setitem_slice(self, key, value):
//anaconda/lib/python2.7/site-packages/pandas/core/frame.pyc in _set_item(self, key, value)
2483
2484 self._ensure_valid_index(value)
-> 2485 value = self._sanitize_column(key, value)
2486 NDFrame._set_item(self, key, value)
2487
//anaconda/lib/python2.7/site-packages/pandas/core/frame.pyc in _sanitize_column(self, key, value, broadcast)
2654
2655 # turn me into an ndarray
-> 2656 value = _sanitize_index(value, self.index, copy=False)
2657 if not isinstance(value, (np.ndarray, Index)):
2658 if isinstance(value, list) and len(value) > 0:
//anaconda/lib/python2.7/site-packages/pandas/core/series.pyc in _sanitize_index(data, index, copy)
2798
2799 if len(data) != len(index):
-> 2800 raise ValueError('Length of values does not match length of ' 'index')
2801
2802 if isinstance(data, PeriodIndex):
ValueError: Length of values does not match length of index"
誰能請我如何能完成我的任務,擺脫幫助這個錯誤? 謝謝你這麼多
嗨,所以一旦我使用LabelEncoder併爲每個唯一名稱分配一個標籤/號碼,我如何將新列(在這種情況下是2)插入原始數據集? – afzaaldeveloper1