Message-ID: <49EC2A17.3020000@statistik.tu-dortmund.de>
Date: 2009-04-20T07:53:59Z
From: Uwe Ligges
Subject: to extract data
In-Reply-To: <617814.36133.qm@web58704.mail.re1.yahoo.com>
Roslina Zakaria wrote:
> Hi R-users,
>
> I have a set of data from 1958-2009, how do I extract the data from 1927 and 2007?
>
> beechworth.dt
> Year Month Rain
> 1 1858 3 21.8
> 2 1858 4 47.0
> 3 1858 5 70.1
> 4 1858 6 78.7
> 5 1858 7 101.6
> 6 1858 8 129.8
> 7 1858 9 80.8
> 8 1858 10 41.9
> ...
>
> 2009 ......
>
>
> I tried:
>
> beechworth.dt.2 <- beechworth.dt[beechworth.dt$Year=="1927":"2007",]
You probably want to index with
beechworth.dt$Year %in% 1927:2007
or
beechworth.dt$Year %in% c(1927, 2007)
(not sure which one given your question "from 1927 and 2007").
Uwe Ligges
>
> and got
>
> Warning message:
> In beechworth.dt$Year == "1927":"2007" :
> longer object length is not a multiple of shorter object length
>
> Thank you so much for any help given.
>
>
>
>
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