R help - Jul 2002 - Trouble With Dates; Recommended Reference?

Hi.

I'm having a little difficulty with R1.5.1. To wit:

(1) Can anyone explain the following behavior?

 > 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.

Thanks,

Ronnen.

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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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Hi!
There is a book about the R/S language for free and worth reading. It's
called "S Poetry" and you will find it here:
http://www.seanet.com/~pburns/Spoetry/

If you anyway want spent some money for a book to learn about the
syntax a clear and concise intro is that by Andreas Krause published by
Springer.

But the best is to take package that is doing something similar to that
what
you want to do and read the source.

Eryk.

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