strptime("June 19, 2017 11:59", "%B %d, %Y %H:%M") 这样的话 我的这个可以直接运行 出结果
> strptime("June 19, 2017 11:59", "%B %d, %Y %H:%M")
[1] "2017-06-19 11:59:00 CST"
> strptime("June 19, 2017 11:59", "%B %d, %Y %H:%M")
[1] "2017-06-19 11:59:00 CST"
2017-06-19