[R] How to know created time of object in R?

[Tony Plate]

The trackObjs package will do this, at the level of objects in an environment.

E.g., from the docs:

 > library(trackObjs)
 > track.start("tmp1")
 > x <- 123                  # Not yet tracked
 > track(x)                  # Variable 'x' is now tracked
 > track(y <- matrix(1:6, ncol=2)) # 'y' is assigned & tracked
 > z1 <- list("a", "b", "c")
 > z2 <- Sys.time()
 > track(list=c("z1", "z2")) # Track a bunch of variables
 > track.summary(size=F)     # See a summary of tracked vars
             class    mode extent length            modified TA TW
x         numeric numeric    [1]      1 2007-09-07 08:50:58  0  1
y          matrix numeric  [3x2]      6 2007-09-07 08:50:58  0  1
z1           list    list  [[3]]      3 2007-09-07 08:50:58  0  1
z2 POSIXt,POSIXct numeric    [1]      1 2007-09-07 08:50:58  0  1
 > # (TA="total accesses", TW="total writes")

(creation time is tracked too, but not displayed with default settings)

For more info, look in the trackObjs package.

-- Tony Plate

Dong-hyun Oh wrote:
> Dear UseRs,
> 
> I would like to know the created time and date of specific object.
> Is there any function for it?
> 
> Thank you in advance.
> 
> 
> Sincerely,
> 
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