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我是新的R. 我在.csv格式的表12K行象下面这样:困难算术与时间中的R
St. date Rgtime RadTime Rain dBZ
3613006 20130113 0:06:00 0:06:00 2 -10.625
3613006 20130113 0:16:00 0:16:00 7 -11.75
3613006 20130113 0:26:00 0:26:00 1 -10.5625
3613006 20130113 0:36:00 0:36:00 9 -11.28125
3613006 20130113 0:46:00 0:46:00 3 -10.34375
3613006 20130113 0:56:00 0:56:00 8 -11.6875
3613006 20130113 1:06:00 1:06:00 9 -16
3613006 20130113 1:16:00 1:16:00 6 -25.3125
3613006 20130113 1:26:00 1:26:00 1 -16.3125
3613006 20130113 1:36:00 1:36:00 0 -20.71875
我想补充2列:
1- $ RgTime - 为10分钟RadTimeNew
2-相关DBZ到RadTimeNew AS dBZ.New
预期结果:
St. date Rgtime Rain RadTime dBZ RadTimeNew dBZ.New
3613006 20130113 0:06:00 2 0:06:00 -10.625 NA NA
3613006 20130113 0:16:00 7 0:16:00 -11.75 0:06:00 -10.625
3613006 20130113 0:26:00 1 0:26:00 -10.5625 0:16:00 -11.75
3613006 20130113 0:36:00 9 0:36:00 -11.28125 0:26:00 -10.5625
3613006 20130113 0:46:00 3 0:46:00 -10.34375 0:36:00 -11.28125
3613006 20130113 0:56:00 8 0:56:00 -11.6875 0:46:00 -10.34375
3613006 20130113 1:06:00 9 1:06:00 -16 0:56:00 -11.6875
3613006 20130113 1:16:00 6 1:16:00 -25.3125 1:06:00 -16
3613006 20130113 1:26:00 1 1:26:00 -16.3125 1:16:00 -25.3125
3613006 20130113 1:36:00 0 1:36:00 -20.71875 1:26:00 -16.3125
我试图使用lag()
,但我的数据时间不会继续,并有一些错误。所以我正在寻找一个新的脚本来处理这个问题。
在此先感谢。
尝试获取有关POSIXlt更多信息'DF%>%变异(RadTimeNew =滞后(RadTime),dBZ.New =滞后(DBZ))'从'dplyr'包。但要注意'stringsAsFactors = FALSE'设置为读取数据 – DatamineR 2015-03-02 15:04:13
或者使用'library(data.table); setDT(df1)[,c('RadTimeNew','dBZ.New'):= shift(.SD),.SDcols = c(4,6)] []' – akrun 2015-03-02 15:07:46
@RStudent该代码不工作! ! – 2015-03-03 03:05:01