R编程，分时系列日期

Question

我只有一个包含一列时间序列的数据文件：

'2012-02-01 17:42:44'                       
'2012-02-01 17:42:44'          
'2012-02-01 17:42:44'

data.frame(table(cut(MyDates, breaks = c("week", "hours")))

将该列转换为as.POSIXct后，我尝试按星期和小时创建频率表
此代码不起作用。

请建议？

Answer 1

使用的正确参数是breaks = "hour"（检查?cut.POSIXt）

MyDates<-read.table(text= "2012-02-01 17:42:44
                            2012-02-01 17:42:44         
                            2012-02-01 17:42:44",
                    header = F, sep = "_", 
                    col.names = "date")

# convet to class POSIXct
MyDates <- as.POSIXct(MyDates$date)

# your frequency tables
hours <- table(cut(MyDates, breaks = "hour"))
weeks <- table(cut(MyDates, breaks = "week"))