A Cumulative Sum of a Column in Pandas?
Code Explanation:
● Library Import: pandas is imported as pd.
● DataFrame Creation: A column 'Sales' is created in df.
● Cumulative Sum: cumsum() calculates the running total.
● Store Result: New column 'Cumulative_Sum' is added to df.
● Output Display: print(df) shows both original and cumulative columns.
Program:
import pandas as pd
df = pd.DataFrame({'Sales': [100, 150, 200, 250]})
df['Cumulative_Sum'] = df['Sales'].cumsum()
print(df)
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