本文介绍了将R中的数字时间转换为datetime POSIXct格式的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 29岁程序员,3月因学历无情被辞! 我有一个数据框,其中包含已经被读入R的datetime列。时间值显示为数字时间,如下面的数据示例所示。我想将它们转换成datetime POSIXct或POSIXlt格式,以便查看日期和时间。 tdat 974478L,974484L,974490L,974496L,974502L,974508L,974514L,974520L,974526L, 974532L,974538L) 974424 应该等于 00:00:00 01/03/2011 ,但不知道数值的起始时间(即1970-01-01以下使用不起作用)。我已经尝试使用下面的命令来实现这一点,并花费了时间尝试获得 as.POXISct 来工作,但是我还没有找到一个解决方案最终得到了一个POSIXct对象的NAs或者结束了晦涩的datetime值)。 尝试将数字时间转换为日期时间: datetime< - as.POSIXct(strptime(time,format =%d /%m /%Y%H:%M:%S)) datetime< - as.POSIXct(as.numeric(time),origin ='1970-01-01') 我确信这是一件简单的事情。任何帮助都将得到很大的收获。谢谢! 解决方案根据您想要的时区,尝试其中一个: t.gmt t.local< - as.POSIXct(format(t.gmt)) I have a data frame containing what should be a datetime column that has been read into R. The time values are appearing as numeric time as seen in the below data example. I would like to convert these into datetime POSIXct or POSIXlt format, so that date and time can be viewed.tdat <- c(974424L, 974430L, 974436L, 974442L, 974448L, 974454L, 974460L, 974466L, 974472L, 974478L, 974484L, 974490L, 974496L, 974502L, 974508L, 974514L, 974520L, 974526L, 974532L,974538L)974424 should equate to 00:00:00 01/03/2011, but the do not know the origin time of the numeric values (i.e. 1970-01-01 used below does not work). I have tried using commands such as the below to achieve this and have spent time trying to get as.POXISct to work, but I haven’t found a solution (i.e. I either end up with a POSIXct object of NAs or end up with obscure datetime values).Attempts to convert numeric time to datetime:datetime <- as.POSIXct(strptime(time, format = "%d/%m/%Y %H:%M:%S"))datetime <- as.POSIXct(as.numeric(time), origin='1970-01-01')I am sure that this is a simple thing to do. Any help would be greatly received. Thanks! 解决方案 Try one of these depending on which time zone you want:t.gmt <- as.POSIXct(3600 * (tdat - 974424), origin = '2011-03-01', tz = "GMT")t.local <- as.POSIXct(format(t.gmt)) 这篇关于将R中的数字时间转换为datetime POSIXct格式的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持! 上岸,阿里云! 08-29 03:32