[R] Data transformation

[legen]

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
>>
>> --
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>>
>> ______________________________________________
>> 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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