Thanks Gabor. Even after doing as you suggested, when I check the
frequency of x, it still shows up as 1. I would have expected it to be 4
now.
> x.ts <- ts(x, start=1, frequency=4)
> frequency(x)
[1] 1
On 11/20/2009 4:05 PM, Gabor Grothendieck wrote:
The first two components of the tsp vector are in time units as
mentioned in ?tsp . Thus you would want:
x <- 1:100
tsp(x) <- c(1, 25.75, 4)
but normally you don't have to set it explicitly in the first place.
Just use ts:
x <- 1:100
x.ts <- ts(x, start = 1, frequency = 4)
tsp(x.ts)
[1] 1.00 25.75 4.00
x.ts
Qtr1 Qtr2 Qtr3 Qtr4
1 1 2 3 4
2 5 6 7 8
3 9 10 11 12
4 13 14 15 16
5 17 18 19 20
6 21 22 23 24
7 25 26 27 28
8 29 30 31 32
9 33 34 35 36
10 37 38 39 40
11 41 42 43 44
12 45 46 47 48
13 49 50 51 52
14 53 54 55 56
15 57 58 59 60
16 61 62 63 64
17 65 66 67 68
18 69 70 71 72
19 73 74 75 76
20 77 78 79 80
21 81 82 83 84
22 85 86 87 88
23 89 90 91 92
24 93 94 95 96
25 97 98 99 100
On Fri, Nov 20, 2009 at 5:53 PM, Samik Raychaudhuri <sam...@gmail.com> wrote:
Hello,
I am wondering how I should set up the tsp attribute (available through
attr(x, "tsp")) of a dataset x? Let's assume that x has 100 points, and I
want to set the frequency to 4.
I tried:
attr(x,"tsp")<-c(1,100,4)
Error in attr(x, "tsp") <- c(1, 100, 4) :
invalid time series parameters specified
Is there any other way to set the frequency of the data?
Thanks.
-Samik
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