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
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