Update:
The whole problem was due to set() from library sets.
'sets' is not a very consistent package, and users should be warned.
Set$new() and as.Set() from set6 work in a predictable, object-oriented way.
Thanks and Best
A Mani
Prof.Dr.(Miss) A Mani
ASL, AMS, ISRS, CLC, CMS, MTA
Senior
df <- data.frame(X1 = c(1,1,1,2,2), X2 = c(1,5,7,3,8))
> df
X1 X2
1 1 1
2 1 5
3 1 7
4 2 3
5 2 8
> v <- with(df, tapply(X2, X1, c))
## v is a list, and I would work directly with this rather than converting
to a data.frame. But if you insist:
> df2 <- data.frame(v, row.names =
The original data frame can be like
Type Id
1 1
1 5
1 7
2 3
2 8
..
tapply(Id,Type,set) will yield the sets correctly (assuming the data
frame is attached) but not a data frame of the form mentioned.
A similar ddply command does not work at
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 wrote:
>
> I want a data frame (derived
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
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