plotting time series for particular months!

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thanks .. and it did work! but i see some jagged lines in between the years, typically like the one? joining dec of previous year and oct of the successive year. Is this how it would look like? can it be made better?

have included the plot!

heres the code..!

x.date <- as.Date(paste(chn.arr[,1], chn.arr[,2], chn.arr[,3], sep="-"))
ts.chn <- ts(chn.arr[1:2386,4])
z.chn <- zoo(ts.chn, x.date)
plot(z.chn, main = "Rainfall variations", xlab = "Year", ylab="Daily rainfall (mm)")
Regards,
Mahalakshmi
Graduate Student
#20, Department of Geography
Michigan State University
East Lansing, MI 48824 Quoting steven mosher <moshersteven at gmail.com>:

> I would look at using? the package 'zoo' your time series data would be a
> zoo object
> and then your date data? would be coerced as well,
>
> zoo, is very slick.
>
> On Thu, Nov 4, 2010 at 12:18 PM, <govindas at msu.edu> wrote:
>
>>
>>
>> Hi all,
>>
>> I have a matrix as given below...
>>
>> year month day prec
>> 1? ?1980? ? 10? ?1 13.4
>> 2? ?1980? ? 10? ?2? 0.0
>> 3? ?1980? ? 10? ?3? 0.0
>> 4? ?1980? ? 10? ?4? 0.0
>> 5? ?1980? ? 10? ?5? 0.0
>> 6? ?1980? ? 10? ?6? 0.0
>> 7? ?1980? ? 10? ?7? 0.0
>> 8? ?1980? ? 10? ?8? 0.0
>> 9? ?1980? ? 10? ?9? 0.0
>> 10? 1980? ? 10? 10? 0.0
>> 11? 1980? ? 10? 11? 7.4
>> 12? 1980? ? 10? 12? 5.4
>> 13? 1980? ? 10? 13? 7.2
>> 14? 1980? ? 10? 14? 0.0
>> 15? 1980? ? 10? 15? 0.0
>> 16? 1980? ? 10? 16? 0.0
>> 17? 1980? ? 10? 17 41.2
>> 18? 1980? ? 10? 18? 0.0
>> 19? 1980? ? 10? 19? 0.0
>> 20? 1980? ? 10? 20? 0.0
>> 21? 1980? ? 10? 21? 0.0
>> 22? 1980? ? 10? 22? 0.0
>> 23? 1980? ? 10? 23? 0.0
>> 24? 1980? ? 10? 24? 0.0
>> 25? 1980? ? 10? 25? 0.0
>> 26? 1980? ? 10? 26? 0.0
>> 27? 1980? ? 10? 27? 2.0
>> 28? 1980? ? 10? 28? 0.0
>> 29? 1980? ? 10? 29? 0.0
>> 30? 1980? ? 10? 30? 0.0
>> 31? 1980? ? 10? 31? 0.0
>> 32? 1980? ? 11? ?1? 0.0
>> 33? 1980? ? 11? ?2? 0.0
>> 34? 1980? ? 11? ?3? 0.0
>> 35? 1980? ? 11? ?4? 0.0
>> 36? 1980? ? 11? ?5 12.4
>>
>> the precipitation values extend from 1980 to 2005, but only for october,
>> november and december. I would? like to plot just these 3 months for the
>> given time period (1980 -? 2005). Is there a way to get these values in the
>> x-axis. i.e. i need a? plot with its axis reading "1980, 1981, 1982 .. 2005"
>> (even if the? months are specified then it should be of more use). for now,
>> i get an? axis like .. "0, 500, ... 2000" (the plot is giving the index
>> values).
>>
>> i tried changing the freq as given below, but did not work!
>> ts.chn <- ts(chn.arr[1:2386,4], start=c(1980, 10), end=c(2005, 12),
>> freq=365)
>> plot(ts.chn)
>>
>> --
>> Regards,
>> Mahalakshmi
>> Graduate Student
>> #20, Department of Geography
>> Michigan State University
>> East Lansing, MI 48824
>>? ? ? ? [[alternative HTML version deleted]]
>>
>>
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>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>>
>>
>
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