Thank you very much! This is exactly what I need... I did not know that there
is such a simple way :)
Antje
Peter Dalgaard schrieb:
> Antje wrote:
>> Hello,
>>
>> I have a vector containing strings of simple operation methods.
>>
>> methods <- c("mean","sd","median") e.g.
>>
>> Now, I'd like to apply these methods to my data and I thought, I could make
>> a
>> do.call. But these methods don't need any further arguments... Do I have to
>> create an empty argument list?
>>
>> I wanted to use a tapply( data, factor, ??? do.call ??? )
>>
>> Can anybody help how to solve this problem?
>>
>>
> Not sure what you mean by "any further arguments", but I wouldn't use
> do.call here:
>
>> names(methods)<-methods
>> with(airquality,
> + lapply(methods, function(f) tapply(Ozone,Month,FUN=f, na.rm=T)))
> $mean
> 5 6 7 8 9
> 23.61538 29.44444 59.11538 59.96154 31.44828
>
> $sd
> 5 6 7 8 9
> 22.22445 18.20790 31.63584 39.68121 24.14182
>
> $median
> 5 6 7 8 9
> 18 23 60 52 23
>
>
>
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