[R] Microseconds for a zoo object?

[Dirk Eddelbuettel]

On 8 May 2008 at 14:58, Creighton, Sean  wrote:
| Hello
| 
| I have a string which contains microseconds, can anyone help on
| constructing this in to a time object, with the microseconds, that I can
| take to a ZOO file?

Easy, just read the docs:

i)  you need %0S instead of %S to parse sub-seconds components

ii) you need to tell R to print sub-second components.

edd at ron:~$ r -e 'posixt <- strptime("2007-12-11 17:09:53.824123", "%Y-%m-%d %H:%M:%OS"); options("digits.secs"=6); print(posixt)'
[1] "2007-12-11 17:09:53.824123"

This used littler, but it's the same for R.  I set 
     options("digits.secs"=6)
in my ~/.Rprofile/

Hth, D.

| 
| Thanks
| Sean
| 
| 
| 
| > UK[1,3] 
| [1] "17:09:53.824"
| > UK[1,1]
| [1] "2007-12-11 00:00:00"
| > mydates <- paste( substr(UK[,1], 1, 10), UK[,3])  
| > mydates[1]
| [1] "2007-12-11 17:09:53.824"
| > is(mydates)
| [1] "character" "vector"   
| > dt1 <- as.POSIXct(strptime(as.character(mydates),"%Y-%m-%d
| %H:%M:%S",tz="GMT"))
| > dt1[1]
| [1] "2007-12-11 17:09:53 GMT"
| > is(dt1)
| [1] "POSIXt"   "oldClass" "POSIXct"  "POSIXlt" 
| > 
| > 
| 
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-- 
Three out of two people have difficulties with fractions.