[R] ddply/tapply and set function

[Jim Lemon]

Hi  A,
I'm unable to work out what you are using as input. Maybe:

id<-data.frame(Type=c(1,2,1,1,2),set=c(1,3,5,7,8))

but that doesn't work with your

tapply(id,Type,set)

command. Perhaps a bit more detail?

Jim



On Wed, Feb 17, 2021 at 7:48 PM A. Mani <a.mani.cms using gmail.com> wrote:
>
> I want a data frame (derived from another data frame) of the form
>
> Type   Set
> 1         {1,5, 7}
> 2         {3,8)
> ..        ....
>
> tapply(Id,Type, set) works, but does not yield a data frame.
> 'set' is from package set/set6/etc
> ddply does not seem to work with the function.
> How should I proceed with this optimally?
>
>
> Thanks and Best
>
> A Mani
>
> Prof.Dr.(Miss) A Mani
> ASL, AMS, ISRS, CLC, CMS, MTA
> Senior Member, International Rough Set Society
> Research Scientist, Indian Statistical Institute, Kolkata
> Formerly HBCSE, TIFR, CU.
> Homepage: https://www.logicamani.in
> Blog: https://logicamani.blogspot.in/
> Research Gate: https://www.researchgate.net/profile/Mani_A
> sip:girlprofessor using ekiga.net
> Pronouns: She/Her/Hers
>
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