another:
ave(as.numeric(Donner$family), Donner$family, FUN=length)
On Fri, Apr 11, 2014 at 10:51 PM, Andrija Djurovic <djandr...@gmail.com>wrote:
> Hi. Here is one solution:
>
> table(Donner$family)[Donner$family]
>
> Andrija
>
>
> On Fri, Apr 11, 2014 at 10:40 PM, Michael Friendly <frien...@yorku.ca>wrote:
>
>> I'm sure this is pretty simple, but it's Friday afternoon, and I just
>> don't see it...
>>
>> In a data frame with a categorical/character factor, I want to add another
>> column giving, for each observation, the frequency of that factor level.
>>
>> An example, where the variable of interest is family:
>>
>> > data("Donner", package="vcdExtra")
>> > str(Donner)
>> 'data.frame': 90 obs. of 5 variables:
>> $ family : Factor w/ 10 levels "Breen","Donner",..: 9 1 1 1 1 1 1 1 1 1
>> ...
>> $ age : int 23 13 1 5 14 40 51 9 3 8 ...
>> $ sex : Factor w/ 2 levels "Female","Male": 2 2 1 2 2 1 2 2 2 2 ...
>> $ survived: int 0 1 1 1 1 1 1 1 1 1 ...
>> $ death : POSIXct, format: "1846-12-29" NA ...
>> > table(Donner$family)
>>
>> Breen Donner Eddy FosdWolf Graves Keseberg McCutchen
>> MurFosPik
>> 9 14 4 4 10 4 3 12
>> Other Reed
>> 23 7
>> >
>>
>> Here, I want to create a new variable, family.size, where all the
>> Breens have 9,
>> the Donners, 14, and so on...
>>
>> --
>> Michael Friendly Email: friendly AT yorku DOT ca
>> Professor, Psychology Dept. & Chair, Quantitative Methods
>> York University Voice: 416 736-2100 x66249 Fax: 416 736-5814
>> 4700 Keele Street Web: http://www.datavis.ca
>> Toronto, ONT M3J 1P3 CANADA
>>
>> ______________________________________________
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>> 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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