[R] restructuring matrix

[yoooooo]

Yea... let's say I constructed a matrix with rownames/colnames be those
unique elements.. then what should I do? I don't want to do mapply, etc to
find the field.. I'm wondering if there's a smarter way using row/col..
etc... Thanks!




Moshe Olshansky-2 wrote:
> 
> If your original matrix is A then 
> unique(A$People) and unique(A$Desc) 
> will produce a vector of different people and a vector
> of different descriptions.
> 
> --- yoooooo <magno_yu at ml.com> wrote:
> 
>> 
>> Hi all, 
>> 
>>     let's say I have matrix
>> 
>> People    Desc    Value
>> Mary      Height    50
>> Mary      Weight   100
>> Fanny    Height     60
>> Fanny     Height    200
>> 
>> Is there a quick way to form the following matrix? 
>> 
>> People   Height    Weight
>> Mary      50         100
>> Fanny     60        200
>> 
>> (Assuming I don't know the length of people/desc and
>> let's say these are
>> characters matrix.. I tried play with row(), col(),
>> etc.. but I don't seem
>> to find like a duplicate match function... 
>> I'm trying to write some one/two liner that convert
>> my resulting matrix to
>> vector and pick the appropriate fields.. etc )
>> 
>> Thanks!
>> 
>> -- 
>> View this message in context:
>>
> http://www.nabble.com/restructuring-matrix-tf3991741.html#a11334950
>> Sent from the R help mailing list archive at
>> Nabble.com.
>> 
>> ______________________________________________
>> R-help at stat.math.ethz.ch mailing list
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>> 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 stat.math.ethz.ch 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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