1.創建DataFrame
df1 = pd.DataFrame(np.arange(0, 12).reshape(3, 4), columns=["A", "B", "C", "D"])
df2 = pd.DataFrame(np.arange(12, 24).reshape(3, 4), columns=["A", "B", "C", "D"])
2.直接合並
new_df = pd.concat([df1, df2], axis=0, ignore_index=True)
print(new_df)
3.outer、inner合併
df3 = pd.DataFrame(np.arange(0, 12).reshape(3, 4), columns=["A", "B", "C", "F"])
df4 = pd.DataFrame(np.arange(12, 24).reshape(3, 4), columns=["A", "C", "D", "E"])
new_df2 = pd.concat([df3, df4], axis=0, join="outer", ignore_index=True)
print(new_df2)
new_df3 = pd.concat([df3, df4], axis=0, join="inner", ignore_index=True)
print(new_df3)