Message-ID: <26295766.post@talk.nabble.com>
Date: 2009-11-11T04:10:09Z
From: legen
Subject: Data transformation
In-Reply-To: <644e1f320911101624p6921e000o46aae0ec5dbfd077@mail.gmail.com>
Thank you for your kind help. Your script works very well. Would you please
show me how to change NaN to zero and column variables 1, 2, ..., 8 to var1,
var2, ..., var8? Thanks again.
Legen
jholtman wrote:
>
> Is this what you want:
>
>> x <- read.table(textConnection("id code1 code2 p
> + 1 4 8 0.1
> + 1 5 7 0.9
> + 2 1 8 0.4
> + 2 6 2 0.2
> + 2 4 3 0.6
> + 3 5 6 0.7
> + 3 7 5 0.9"), header=TRUE)
>> closeAllConnections()
>> # create object like output from 'melt'
>> x.m <- data.frame(id=c(x$id, x$id), var=c(x$code1, x$code2),
> + variable=rep('p', 2*nrow(x)), value=c(x$p, x$p))
>> require(reshape) # use the reshape package
>> cast(x.m, id ~ var, mean)
> id 1 2 3 4 5 6 7 8
> 1 1 NaN NaN NaN 0.1 0.9 NaN 0.9 0.1
> 2 2 0.4 0.2 0.6 0.6 NaN 0.2 NaN 0.4
> 3 3 NaN NaN NaN NaN 0.8 0.7 0.9 NaN
>>
>
>
>
> On Tue, Nov 10, 2009 at 4:30 PM, legen <legendy at gmail.com> wrote:
>>
>> Dear all,
>>
>> I have a dataset as below:
>>
>> id ? ?code1 ? ?code2 ? ? ? ? p
>> ?1 ? ? ? ?4 ? ? ? ?8 ? ? ? ? ? 0.1
>> ?1 ? ? ? ?5 ? ? ? ?7 ? ? ? ? ? 0.9
>> ?2 ? ? ? ?1 ? ? ? ?8 ? ? ? ? ? 0.4
>> ?2 ? ? ? ?6 ? ? ? ?2 ? ? ? ? ? 0.2
>> ?2 ? ? ? ?4 ? ? ? ?3 ? ? ? ? ? 0.6
>> ?3 ? ? ? ?5 ? ? ? ?6 ? ? ? ? ? 0.7
>> ?3 ? ? ? ?7 ? ? ? ?5 ? ? ? ? ? 0.9
>>
>> I just want to rewrite it as this (vertical to horizontal):
>>
>> id ? var1 ?var2 ?var3 ?var4 ?var5 ?var6 ?var7 ?var8
>> 1 ? ? ? ?0 ? ? ?0 ? ? ?0 ? ?0.1 ? 0.9 ? ? ? 0 ? 0.9 ? ?0.1
>> 2 ? ? 0.4 ? ?0.2 ? 0.6 ? ?0.6 ? ? ?0 ? ?0.2 ? ? ?0 ? ?0.4
>> 3 ? ? ? ?0 ? ? ?0 ? ? ?0 ? ? ?0 ? ?0.8 ? ?0.7 ? ?0.9 ? ? ?0
>>
>> For the third subject, there are two values being equal to 5 in code1 and
>> code2, but different values in p: ?0.7 and 0.9, so I assigned their
>> average
>> 0.8 in var5.
>>
>> Does anybody can help me to handle this? Many thanks for your
>> consideration
>> and time.
>>
>> Legen
>>
>> --
>> View this message in context:
>> http://old.nabble.com/Data-transformation-tp26291568p26291568.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
>> ______________________________________________
>> 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.
>>
>
>
>
> --
> Jim Holtman
> Cincinnati, OH
> +1 513 646 9390
>
> What is the problem that you are trying to solve?
>
> ______________________________________________
> 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.
>
>
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