Author: 儲蓄保險王
![Python如何做excel的樞紐分析? DataFrame .pivot_table (values=None, index=None, columns=None, aggfunc='mean') ; df.groupby(['A', 'B', 'C'], sort=False)['D'].sum().unstack('C') - 儲蓄保險王](https://savingking.com.tw/wp-content/uploads/2023/03/20230325141855_86-720x340.png)
Python如何對DataFrame內容做函式運算? pandas.DataFrame.apply() ; result_broadcast = df.apply(func, axis=1, result_type=’broadcast’)
apply()主要用在 Python: 如何對 pandas.Dat...
![Python 如何做excel的樞紐分析? pandas.pivot_table() 或 pandas.DataFrame .groupby() ; 如何指定欄位順序? DataFrame.reindex() ; .sortlevel() ; DataFrame[[col1, col2, col3 ]] ; df.columns.map() ; 如何顯示所有欄? pandas.set_option ("display.max_columns", None) - 儲蓄保險王](https://savingking.com.tw/wp-content/uploads/2023/03/20230323101848_80-720x340.png)
如何用tkinter製作Python的GUI(圖形使用者介面)? 如何做出計算機? eval() 可將字串還原為python指令
from tkinter import * #會造成變數汙染,最好不...
![Python 如何做excel的樞紐分析? pandas.DataFrame.groupby() ; .agg( {column name: function name} ) ; 如何讀取多層index的xlsx檔案? df = pandas.read_excel (fpath, index_col =[0,1]) ; 如何顯示所有欄? pd.set_option ( "display.max_columns", None) - 儲蓄保險王](https://savingking.com.tw/wp-content/uploads/2023/03/20230321113121_64-720x340.png)
![Python: 如何用numpy.ndarray的reshape 將3D array轉為2D array,再轉為pandas.DataFrame? arr.reshape( arr.shape[0] * arr.shape[1] , -1) - 儲蓄保險王](https://savingking.com.tw/wp-content/uploads/2023/03/20230320082325_85-297x340.png)
Python: 如何用numpy.ndarray的reshape 將3D array轉為2D array,再轉為pandas.DataFrame? arr.reshape( arr.shape[0] * arr.shape[1] , -1)
import numpy as np import pandas a...
![Python: pandas.DataFrame 如何找出重複值並計算重複次數? counts = df[duplicates] .groupby(['name']) .size() .reset_index(name='count') - 儲蓄保險王](https://savingking.com.tw/wp-content/uploads/2023/03/20230316131103_65-720x340.png)
Python: pandas.DataFrame 如何找出重複值並計算重複次數? counts = df[duplicates] .groupby([‘name’]) .size() .reset_index(name=’count’)
import pandas as pd data = {‘...
![Python: 如何對 pandas.DataFrame 兩欄位運算後,增加到最後一欄? df['sum_AB'] = df.apply(sum_ab, axis=1) ; lambda函式 - 儲蓄保險王](https://savingking.com.tw/wp-content/uploads/2023/03/20230314200417_4-720x340.png)
Python: 如何對 pandas.DataFrame 兩欄位運算後,增加到最後一欄? df[‘sum_AB’] = df.apply(sum_ab, axis=1) ; lambda函式
import pandas as pd import numpy a...
![Python: 如何創建多層column name的pandas.DataFrame? df = pd.read_csv ('data.csv', header=[0, 1], sep=",") ; col = pd .MultiIndex .from_arrays( aryCol ) - 儲蓄保險王](https://savingking.com.tw/wp-content/uploads/2023/03/20230314164119_32-720x340.png)
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