[R] structure data

[Antje]

Yes, I know, that these methods might help to calculate but my question was 
more about how to structure the data that I can realize this easy computation 
afterwards. Due to the flexibility I need, I would like to avoid calculations I 
don't need...

Antje


John Kane schrieb:
> Have a look at ?aggregate or the doBy library.  They
> may be what you want.
> --- Antje <antje.niederlein at yahoo.de> wrote:
> 
>> Hello,
>>
>> I have a quite simple question, I guess. I have a
>> data frame and I would like 
>> to process the data in several ways.
>> The processing is dependent on grouping (factors)
>> and the parameter itself. 
>> Meaning for parameter1 in the df, I would like to
>> calculate the mean and sd 
>> when grouping by factor1. But parameter2 might be
>> different. I thought of a 
>> structure like this:
>>
>> group1
>>      param1   (mean, sd)
>>      param2   (sum)
>>
>> group2
>>      param1   (mean, sd, median)
>>      param2   (mean, sd)
>>
>> I'm not sure how to build up this "processing info"
>> structure. (The processing 
>> itself will be later based on this structure).
>> Would you use a list? (matrix and vector are not so
>> flexible for different 
>> length...)
>>
>> Can anybody help m with this?
>>
>> Antje
>>
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>>
> 
> 
> 

>