我有两个数据集，我在下面添加了屏幕截图
Macro.csv（图像中的完整列列表） Macro.csv
Year-Month Year Month Monthly Nominal GDP Index (inMillion$) \
0 2009 - Jan 2009 1 14421.752895
1 2009 - Feb 2009 2 14389.200466
2 2009 - Mar 2009 3 14340.701639
3 2009 - Apr 2009 4 14326.815525
4 2009 - May 2009 5 14345.904809
5 2009 - Jun 2009 6 14348.530666
6 2009 - Jul 2009 7 14317.372922
7 2009 - Aug 2009 8 14424.284901
8 2009 - Sep 2009 9 14410.777177
9 2009 - Oct 2009 10 14596.605447
10 2009 - Nov 2009 11 14590.432252
11 2009 - Dec 2009 12 14512.495301
12 2010 - Jan 2010 1 14613.991481
13 2010 - Feb 2010 2 14652.880272
14 2010 - Mar 2010 3 14776.317248
15 2010 - Apr 2010 4 14844.531193
16 2010 - May 2010 5 14875.698436
17 2010 - Jun 2010 6 14945.570371
18 2010 - Jul 2010 7 15019.235263
19 2010 - Aug 2010 8 15036.277627
20 2010 - Sep 2010 9 15117.467110
21 2010 - Oct 2010 10 15219.059036
22 2010 - Nov 2010 11 15185.628947
23 2010 - Dec 2010 12 15285.936017
24 2011 - Jan 2011 1 15149.136163
25 2011 - Feb 2011 2 15161.578331
26 2011 - Mar 2011 3 15404.398506
27 2011 - Apr 2011 4 15488.004864
Train.csv
Year Month ProductCategory Sales(In ThousandDollars)
0 2009 1 WomenClothing 1755.0
1 2009 1 MenClothing 524.0
2 2009 1 OtherClothing 936.0
3 2009 2 WomenClothing 1729.0
4 2009 2 MenClothing 496.0
5 2009 2 OtherClothing 859.0
6 2009 3 WomenClothing 2256.0
7 2009 3 MenClothing 542.0
8 2009 3 OtherClothing 921.0
9 2009 4 WomenClothing 2662.0
10 2009 4 MenClothing 669.0
11 2009 4 OtherClothing 914.0
12 2009 5 WomenClothing 2732.0
13 2009 5 MenClothing 650.0
14 2009 5 OtherClothing 989.0
15 2009 6 WomenClothing 2220.0
16 2009 6 MenClothing 607.0
17 2009 6 OtherClothing 932.0
18 2009 7 WomenClothing 2164.0
19 2009 7 MenClothing 575.0
20 2009 7 OtherClothing 901.0
21 2009 8 WomenClothing 2371.0
22 2009 8 MenClothing 551.0
23 2009 8 OtherClothing 865.0
24 2009 9 WomenClothing 2421.0
25 2009 9 MenClothing 579.0
26 2009 9 OtherClothing 819.0
27 2009 10 WomenClothing 2579.0
28 2009 10 MenClothing 610.0
29 2009 10 OtherClothing 914.0
.. ... ... ... ...
186 2014 3 WomenClothing 4268.0
187 2014 3 MenClothing 702.0
在macro.csv中，您可以看到我每年一年的每个月都有一条记录，而在train.csv中，我一年中的每个月都有3条记录。 我想将Macro.csv与所有列字段合并到Train.csv中，以便我一年中每个月都有3条记录，其中所有列都在Macro.csv中。
答案 0 :(得分：1)