[R] ddply/tapply and set function

[A. Mani]

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.
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