[R] adding a frequency variable to a data frame

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:

Re: [R] adding a frequency variable to a data frame

Hi. Here is one solution: table(Donner$family)[Donner$family] Andrija On Fri, Apr 11, 2014 at 10:40 PM, Michael Friendly frien...@yorku.cawrote: 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

Re: [R] adding a frequency variable to a data frame

another: ave(as.numeric(Donner$family), Donner$family, FUN=length) On Fri, Apr 11, 2014 at 10:51 PM, Andrija Djurovic djandr...@gmail.comwrote: Hi. Here is one solution: table(Donner$family)[Donner$family] Andrija On Fri, Apr 11, 2014 at 10:40 PM, Michael Friendly

Re: [R] adding a frequency variable to a data frame

Bingo! That's exactly the idiom I was looking for. Thanks, Andrija. -Michael On 4/11/2014 4:57 PM, Andrija Djurovic wrote: another: ave(as.numeric(Donner$family), Donner$family, FUN=length) -- Michael Friendly Email: friendly AT yorku DOT ca Professor, Psychology Dept. Chair,