[R] to extract data

[ronggui]

If Year is numeric data, then you can use:
beechworth.dt.2 <- subset(beechworth.dt, Year>=1997 & Year <=2008)
If it is character, then you can use:
beechworth.dt.2 <- subset(beechworth.dt, Year %in% as.character(1997:2008))

2009/4/20 Roslina Zakaria <zroslina at yahoo.com>:
>
> 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$Year=="1927":"2007",]
>
> and got
>
> Warning message:
> In beechworth.dt$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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>



-- 
HUANG Ronggui, Wincent
PhD Candidate
Dept of Public and Social Administration
City University of Hong Kong
Home page: http://asrr.r-forge.r-project.org/rghuang.html