请大家帮忙看看,非常感谢!
数据和代码如下
keep if report_time>=date("10 dec 2021 00:00:00","DMYhms") & report_time<=date("10 dec 2021 16:00:00","DMYhms")
----------------------- copy starting from the next line -----------------------
- * Example generated by -dataex-. To install: ssc install dataex
- clear
- input double report_time
- 1954540931000
- 1954713732000
- 1954713733000
- 1954713734000
- 1954540935000
- 1954627336000
- 1954724537000
- 1954713738000
- 1954756939000
- 1954720340000
- 1954627341000
- 1954713742000
- 1954713743000
- 1954713744000
- 1954771345000
- 1954796576000
- end
- format %tc report_time
------------------ copy up to and including the previous line ------------------


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