R help - Jun 2011 - Problem with as.POSIXct()

Hi, when I type in these words:
> a=c("2011-06-01 17:21:24.83", "2011-06-01
17:21:24.283")
> as.POSIXct(a)
the real output is:
   [1] "2011-06-01 17:21:24.830 CST" "2011-06-01 17:21:24.283
CST"
   
rather than the expected one:
   [1] "2011-06-01 17:21:24.083 CST" "2011-06-01 17:21:24.283
CST"

How can I deal with such milliseconds less than 100?

Thanks



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circe <tju_circe <at> hotmail.com> writes:
> 
> Hi, when I type in these words:
> 
> > a=c("2011-06-01 17:21:24.83", "2011-06-01
17:21:24.283")
> > as.POSIXct(a)
> 
> the real output is:
>    [1] "2011-06-01 17:21:24.830 CST" "2011-06-01
17:21:24.283 CST"
> 
> rather than the expected one:
>    [1] "2011-06-01 17:21:24.083 CST" "2011-06-01
17:21:24.283 CST"
> 
> How can I deal with such milliseconds less than 100?
> 
> Thanks
> 
> --
> View this message in context:
http://r.789695.n4.nabble.com/Problem-with-as-POSIXct-tp3565424p3565424.html
> Sent from the R help mailing list archive at Nabble.com.
> 
> 

Well, to me the R is behaving as expected. I.e. .83 = .830. If Your dates come
in a format like You describe, You need to manually add a leading zero to Your
milliseconds.

A suggestion to work from:

for(i in 1:length(a)){
  if(nchar(a[i]) == 23){
    print(a[i])
  }else{
    print( paste(substr(a[i],1,20),0,substr(a[i],21,22),sep='') ) 
  }
}