Re: [R] How to convert time to days

From: Don MacQueen <macq_at_llnl.gov>
Date: Thu 27 Oct 2005 - 06:00:08 EST

The word "secs" appears in "Run time: 1.960625 secs" because you put it there in your cat() statement. It has nothing to do with the number itself.

Simply try typing

    end.time - begin.time

at the prompt, and see what you get.

Then see

   ?difftime
for more information. Example

    difftime(end.time,begin.time,units='hours')

To get the interval formatted as "1 day, 23 hours, x minutes, x seconds" you will have to do more work.

-Don

At 4:18 PM +0200 10/26/05, Muhammad Subianto wrote:
>Dear all,
>I have ran a simulation in R.
>This simulation was running about at least two days.
>Here is below the result some part of my code about time result.
>I don't understand about
>
>Start time: Mon Oct 24, 2005 at 04:23:01 PM
> Finish time: Wed Oct 26, 2005 at 03:26:19 PM
> Run time: 1.960625 secs.
>
>This is about two seconds or one day and nine hours?
>Then, how could I convert to 1 day, 23 hours, ? minutes, ? seconds.
>Thanks you very much for any suggestions.
>
>Best wishes, Muhammad Subianto
>
> >
>################################################################################
> > # Begin of program and timestamp:
> > cat(format(begin.time <- Sys.time(), "%a %b %d %X %Y") ,"\n")
>Mon Oct 24 04:23:01 PM 2005
> > cat("Start time:", secs <- format(begin.time, "%X"), "\n")
>Start time: 04:23:01 PM
> > cat("Sys.time:", begin.time <- Sys.time(), '\n')
>Sys.time: 1130163781
> >
> >
>--- CODE SIMULATION ---
> >
> > # End of program and timestamp:
> > cat("Sys.time:",end.time <- Sys.time(), '\n')
>Sys.time: 1130333179
> > cat("Run Time:",end.time-begin.time, 'secs.\n\n')
>Run Time: 1.960625 secs.
>
> > cat("Finish time:", secs <- format(end.time, "%X"), "\n")
>Finish time: 03:26:19 PM
> > cat(format(end.time <- Sys.time(), "%a %b %d %X %Y") ,"\n")
>Wed Oct 26 03:26:19 PM 2005
> >
> > cat("\n",
>+ " Start time:", secs <- format(begin.time, "%a %b %d, %Y at
>%X"), "\n",
>+ "Finish time:", secs <- format(end.time, "%a %b %d, %Y at
>%X"), "\n",
>+ " Run time:", end.time-begin.time, 'secs.\n\n')
>
> Start time: Mon Oct 24, 2005 at 04:23:01 PM
> Finish time: Wed Oct 26, 2005 at 03:26:19 PM
> Run time: 1.960625 secs.
>
> >
>###########################################################################
>
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-- 
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA

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Received on Thu Oct 27 06:04:41 2005

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