Message-ID: <971536df0911201525g260e25a6ld04cbe3cd52d0435@mail.gmail.com>
Date: 2009-11-20T23:25:08Z
From: Gabor Grothendieck
Subject: How to setup the tsp attribute of a dataset
In-Reply-To: <4B072473.8090408@gmail.com>
Not for me.
> x <- 1:100
> x.ts <- ts(x, start = 1, frequency = 4)
> frequency(x.ts)
[1] 4
On Fri, Nov 20, 2009 at 6:21 PM, Samik Raychaudhuri <samikr at gmail.com> wrote:
> 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 <samikr at 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
>>>
>>> ______________________________________________
>>> R-help at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide
>>> http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>>
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>