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雷达卡
请问老师， stata16中周数据如何批量处理一对多匹配其他多个表格的年数据和月度数据，并不是高频数据转化为低频数据，谢谢
ii week yield Turnover GMV Close V26 V52
1 2009-01-09 9.08 9363.67 67954.73 1306.01
1 2009-01-16 2.19 10319.47 83513.48 1334.61
1 2009-01-23 -.94 14075.3 116480.64 1322.12
1 2009-02-06 9.38 20921.96 182970.24 1446.15
1 2009-02-13 11.52 30055.1 305034.98 1612.73
1 2009-02-20 -5.05 15885.37 163540.72 1531.28
1 2009-02-27 -13.59 14906.27 125631.86 1323.13
1 2009-03-06 5.92 15075.42 127672.15 1401.5
1 2009-03-13 -1.83 9162.21 72661.35 1375.87
1 2009-03-20 5.92 14934.63 128613.41 1457.38
...... ..........
ii week yield Turnover GMV Close V26 V52
30 2020-08-21 .71 17818.99 17818.99 17818.99 39.35 37.75
30 2020-08-28 -1.97 21514.44 21514.44 21514.44 37.33 37.74
30 2020-09-04 -.26 27524.53 27524.53 27524.53 34.19 36.73
30 2020-09-11 -4.22 20598.11 20598.11 20598.11 33.86 36.78
30 2020-09-18 6.06 31716.83 31716.83 31716.83 33.32 37.23
30 2020-09-25 -5.1 13893.73 13893.73 13893.73 34.15 36.99
30 2020-09-30 -2.38 12449.54 12449.54 12449.54 34.84 37.26
30 2020-10-09 2.91 15790.29 15790.29 15790.29 34.52 37.02
30 2020-10-16 .92 16172.39 16172.39 16172.39 34.39 36.9
30 2020-10-23 -3.54 13724.27 13724.27 13724.27 34.75 36.91
30 2020-10-30 -5.28 17147.25 17147.25 17147.25 35.43 36.9
30 2020-11-06 .85 14604.83 14604.83 14604.83 35.25 36.76
30 2020-11-13 -.98 9334.99 9334.99 9334.99 35.25 36.15
30 2020-11-20 2.03 12122.7 12122.7 12122.7 34.41 36.14
30 2020-11-27 -1.2 13558.24 13558.24 13558.24 33.55 35.78
30 2020-12-04 1.83 17194.27 17194.27 17194.27 33.52 35.74
30 2020-12-11 -5.2 13910.25 13910.25 13910.25 34.34 35.97
30 2020-12-18 -2.11 12404.4 12404.4 12404.4 34.38 35.69
30 2020-12-25 -7.13 10800.83 10800.83 10800.83 35.36 36.39
30 2020-12-31 3.11 21506.4 21506.4 21506.4 33.88 35.69
比如该种面板数据结构，想把week数据形式批量分类为对应的 年度，月度数据，再与其他表的年度和月度匹配 ，并不是要高频数据转化为低频数据，不知道，stata16代码如何实现，请好心人帮忙解答，感谢支持
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