zoo/xts microsecond read issue

问题

The data looks like

           Time  Set1    Set2   
10:19:38.551629 16234   16236   
10:19:41.408010 16234   16236   
10:19:47.264204 16234   16236   

I am trying to load this into zoo.

orig <- read.zoo("~/sample.txt",sep="",header=TRUE,index.column=1,format="%H:%M:%S.%6f")

Error in read.zoo("~/sample.txt", sep = "", header = TRUE, index.column = 1,  : 
  index has 3 bad entries at data rows: 1 2 3 ...

I have checked all the relevant posts 1. R issue with rounding milliseconds 2. Milliseconds puzzle when calling strptime in R 3. How to parse milliseconds in R?

However this does not help. Any Suggestions

回答1:

You want the index to be a time class such as POSIXct or POSIXlt. Also, your format argument wasn't quite right. Try this

read.zoo("~/sample.txt", header = TRUE, format="%H:%M:%OS", FUN=as.POSIXct)

Which, for the sample data provided, gives

read.zoo(text="           Time  Set1    Set2   
10:19:38.551629 16234   16236   
10:19:41.408010 16234   16236   
10:19:47.264204 16234   16236   ", header = TRUE, format="%H:%M:%OS", FUN=as.POSIXct)
#                            Set1  Set2
#2012-06-21 10:19:38.551629 16234 16236
#2012-06-21 10:19:41.408010 16234 16236
#2012-06-21 10:19:47.264204 16234 16236

来源：https://stackoverflow.com/questions/11136340/zoo-xts-microsecond-read-issue