Thanks for all the help, They all worked, But I'm stuck again.
I've tried searching, but I not sure how to word my search as nothing came
up.
Here is my new hurdle, my data has 7 abservations and my results have 2
answers:
Here is my data
LEAID ratio
3 6307 0.7200000
1 6307 0.7623810
2 6307 0.8600000
4 6307 0.9200000
5 8300 0.5678462
7 8300 0.7700000
6 8300 0.8300000
> median<-summaryBy(ratio ~ LEAID, data = Dataset, FUN = median)
> print(median)
LEAID ratio.median
1 6307 0.8111905
2 8300 0.7700000
Now what I want is a way to compute
abs(ratio- median)by LEAID for each observation to produce something like
this
LEAID ratio abs
3 6307 0.7200000 .0912
1 6307 0.7623810 .0488
2 6307 0.8600000 .0488
4 6307 0.9200000 .1088
5 8300 0.5678462 .2022
7 8300 0.7700000 .0000
6 8300 0.8300000 .0600
Thanks,
L.A.
Ista Zahn wrote:
>
> Hi,
> I think you want
>
> by(TestData[ , "RATIO"], LEAID, median)
>
> -Ista
>
> On Tue, Dec 8, 2009 at 8:36 PM, L.A. <ro...@millect.com> wrote:
>>
>> I'm just learning and this is probably very simple, but I'm stuck.
>> I'm trying to understand the by().
>> This works.
>> by(TestData, LEAID, summary)
>>
>> But, This doesn't.
>>
>> by(TestData, LEAID, median(RATIO))
>>
>>
>> ERROR: could not find function "FUN"
>>
>> HELP!
>> Thanks,
>> LA
>> --
>> View this message in context:
>> http://n4.nabble.com/by-function-tp955789p955789.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
>> ______________________________________________
>> R-help@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.
>>
>
>
>
> --
> Ista Zahn
> Graduate student
> University of Rochester
> Department of Clinical and Social Psychology
> http://yourpsyche.org
>
> ______________________________________________
> R-help@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.
>
>
--
View this message in context:
http://n4.nabble.com/by-function-tp955789p962666.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
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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.
