Dear R helpers,
Thanks a lot for your kind help. The xtab function suggested by Mr. Henrique
Dallazuanna produces following output for me
> xtabs(values ~ name + period + cy_date, rat_dat)
, , cy_date = 31-May-11
period
name 29-Mar-11 30-Mar-11 31-Mar-11
A 10.37 10.46 10.42
B 12.61 12.65 12.62
C 14.08 14.12 14.10
D 11.17 11.15 11.11
#
---------------------------------------------------------------------------------------------
I am extremely sorry for framing my question in a wrong way and the output I
wanted got scattered in my first mail. I am reframing my query as under.
I have a data.frame
rat_dat = data.frame(name = c("A", "A", "A", "B", "B", "B", "C", "C", "C", "D",
"D", "D"),
period = c("31-Mar-11", "30-Mar-11", "29-Mar-11",
"31-Mar-11", "30-Mar-11", "29-Mar-11", "31-Mar-11", "30-Mar-11", "29-Mar-11",
"31-Mar-11", "30-Mar-11", "29-Mar-11"),
values = c(10.42, 10.46, 10.37, 12.62, 12.65, 12.61, 14.10, 14.12, 14.08,
11.11, 11.15, 11.17))
> rat_dat
name period values
1 A 31-Mar-11 10.42
2 A 30-Mar-11 10.46
3 A 29-Mar-11 10.37
4 B 31-Mar-11 12.62
5 B 30-Mar-11 12.65
6 B 29-Mar-11 12.61
7 C 31-Mar-11 14.10
8 C 30-Mar-11 14.12
9 C 29-Mar-11 14.08
10 D 31-Mar-11 11.11
11 D 30-Mar-11 11.15
12 D 29-Mar-11 11.17
I need to rearrange this data as new new data.frame
rat_dat_new as
period A B C D
31-Mar-11 10.42 12.62 14.10 11.11
30-Mar-11 10.46 12.65 14.12 11.15
29-Mar-11 10.37 12.61 14.08 11.17
I once again apologize for mistake on my part.
I tried to the solution suggested by Mr. Henrique Dallazuanna, however I was
not able to read the output as a data.frame.
Kindly guide
--- On Thu, 7/4/11, Henrique Dallazuanna <www...@gmail.com> wrote:
From: Henrique Dallazuanna <www...@gmail.com>
Subject: Re: [R] Regrouping data
To: "Sandeepa Ramakrishnan" <sandeepa_ramakrish...@yahoo.com>
Cc: r-help@r-project.org
Date: Thursday, 7 April, 2011, 6:05 PM
Try this:
1)
xtabs(values ~ name + period + cy_date, rat_dat)
2)
as.Date(rat_dat$cy_date, '%d-%b-%y') - as.Date(rat_dat$period, '%d-%b-%y')
On Thu, Apr 7, 2011 at 9:03 AM, Sandeepa Ramakrishnan
<sandeepa_ramakrish...@yahoo.com> wrote:
>
>
>
>
>
>
>
>
>
> Dear R forum
>
> I have just started my venture with R. While I am trying to learn R through
> the tutorials, I think the current problem I need to address to is beyond my
> knowledge about R.
>
> I have a dataframe as defined below -
>
>
> rat_dat = data.frame(name = c("A", "A", "A", "B", "B", "B", "C", "C", "C",
> "D", "D", "D"),
> period = c("31-Mar-11", "30-Mar-11",
> "29-Mar-11", "31-Mar-11", "30-Mar-11", "29-Mar-11", "31-Mar-11",
> "30-Mar-11", "29-Mar-11", "31-Mar-11", "30-Mar-11", "29-Mar-11"),
> cy_date = c("31-May-11","31-May-11", "31-May-11", "31-May-11", "31-May-11",
> "31-May-11", "31-May-11", "31-May-11", "31-May-11", "31-May-11", "31-May-11",
> "31-May-11"),
> values = c(10.42, 10.46, 10.37, 12.62, 12.65, 12.61, 14.10, 14.12, 14.08,
> 11.11, 11.15, 11.17))
>
>
>> rat_dat
> name period cy_date values
> 1 A 31-Mar-11 31-May-11 10.42
> 2 A 30-Mar-11 31-May-11 10.46
> 3 A 29-Mar-11 31-May-11 10.37
> 4 B 31-Mar-11 31-May-11 12.62
> 5 B 30-Mar-11 31-May-11 12.65
> 6 B 29-Mar-11 31-May-11 12.61
> 7 C 31-Mar-11 31-May-11 14.10
> 8 C 30-Mar-11 31-May-11 14.12
> 9 C 29-Mar-11 31-May-11 14.08
> 10 D 31-Mar-11 31-May-11 11.11
> 11 D 30-Mar-11 31-May-11 11.15
> 12 D 29-Mar-11 31-May-11 11.17
>
> My actual data is too large. I need to
>
> (1) rearrange this input as
>
>
>
>
>
>
>
>
>
> period
> cy_date
> A
> B
> C
> D
>
> 31-Mar-11
> 31-May-11
> 10.42
> 12.62
> 14.10
> 11.11
>
> 30-Mar-11
> 31-May-11
> 10.46
> 12.65
> 14.12
> 11.15
>
> 29-Mar-11
> 31-May-11
> 10.37
> 12.61
> 14.08
> 11.17
>
> (2) Also, I need to find the difference between (rat_dat$cy_date) -
> (rat_dat$period)
>
> I hope I am able to put forward my requirement properly. If not, please
> forgive me.
>
> Sandeepa
>
> [[alternative HTML version deleted]]
>
>
> ______________________________________________
> R-help@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.
>
>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
[[alternative HTML version deleted]]
______________________________________________
R-help@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.
