[R] Weird Excel Time Format

Jeff Newmiller jdnewmil at dcn.davis.ca.us
Tue Nov 29 19:26:12 CET 2011

You haven't indicated how you are accessing the Excel file, or whether it is an XLS or XLSX file. It sounds like you might be using rcom or a dependent package, in which case you may need to read the Excel COM interface documentation more carefully. In any event, you can't expect as.Date to understand the floating-point numbers as if they were formatted dates it they aren't.
For my part, I highly recommend exporting to CSV before importing to R.
Jeff Newmiller                        The     .....       .....  Go Live...
DCN:<jdnewmil at dcn.davis.ca.us>        Basics: ##.#.       ##.#.  Live Go...
                                      Live:   OO#.. Dead: OO#..  Playing
Research Engineer (Solar/Batteries            O.O#.       #.O#.  with
/Software/Embedded Controllers)               .OO#.       .OO#.  rocks...1k
Sent from my phone. Please excuse my brevity.

Hasan Diwan <hasan.diwan at gmail.com> wrote:

>I have a 10-column XLS file, with 2 date fields. As far as I can tell,
>they were configured identically in Excel 2010. One of these fields
>resembles "39406.577662037", whilst in Excel, it is shown as
>"2007-11-20 13:42:20". Applying as.Date() with the default format
>doesn't do it. Any ideas as to what format this is? Many thanks! -- H
>Sent from my mobile device
>Envoyait de mon portable
>R-help at r-project.org mailing list
>PLEASE do read the posting guide
>and provide commented, minimal, self-contained, reproducible code.

More information about the R-help mailing list