[R] Trouble With Dates; Recommended Reference?

ripley@stats.ox.ac.uk ripley at stats.ox.ac.uk
Sun Jul 21 09:19:36 CEST 2002

On Sat, 20 Jul 2002, Ronnen Levinson wrote:

> Hi.
> I'm having a little difficulty with R1.5.1. To wit:
> (1) Can anyone explain the following behavior?

No. I can't reproduce it either.  Platform?  Your build is definitely
broken, and that probably means some facility of the OS used is broken.

>  > a=strptime("2002-06-01 12:15:01","%Y-%m-%d %H:%M:%S")
>  > a
> [1] "2002-06-01 12:15:01"
>  > a+0
> [1] "1932-04-25 21:46:45"
>  > a+3600
> [1] "1932-04-25 22:46:45"
> (2) Can anyone recommend an introductory R text other than that supplied
> with the R package? My objective is to use R
> to filter, plot, and regress experimental data. So far I have read the
> Intro To R file and have spent many hours hunting through the reference
> files to try to understand R syntax and find useful features that are
> generally buried within. Of the dozen or so languages that I work with,
> this has been one of the most perplexing to learn from the supplied
> manuals.

That's not the intention.  R is an implementation of the S language.
You need to read one or more books on the language, and yes, that will not
be free.  There are recommendations in the FAQ, no less.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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