R help - Jun 2008 - possible bug in flexclust

Hi - Writing to see if someone can suggest whether a problem warrants a bug
report. It concerns the use of stepFlexclust in the flexclust package. The
problem concerns the size of clusters returned.

Versions: R-2.7.0 on Windows XP; RODBC_1.2-3

code snippet:
r8 <- stepFlexclust(df,8,nrep=100,FUN=kcca,
family=kccaFamily("kmedians"))
summary(r8)  ## returns cluster sizes of 51, 115, 218, 73, 118, 140, 311,
and 118
trev <- data.frame(r8@cluster)
sqlSave(ch, trev, rownames="unitid")

in MySQL:
select r8cluster, count(*) from trev group by 1 order by 1   ## returns
cluster sizes of 51, 116, 217, 73, 117, 140, 312, 118

problem:
4 of the 8 clusters differ in sizes. They're close but I'd think they
should
be exact.


So ... bug or not a bug? It'd be nice if I was just doing something wrong.

Thanks.

Gary

	[[alternative HTML version deleted]]

>>>>> On Wed, 4 Jun 2008 13:40:58 -0400,
>>>>> Gary Lewis (GL) wrote:
  > Hi - Writing to see if someone can suggest whether a problem warrants a
bug
  > report. It concerns the use of stepFlexclust in the flexclust package.
The
  > problem concerns the size of clusters returned.

  > Versions: R-2.7.0 on Windows XP; RODBC_1.2-3

  > code snippet:
  > r8 <- stepFlexclust(df,8,nrep=100,FUN=kcca,
family=kccaFamily("kmedians"))
  > summary(r8)  ## returns cluster sizes of 51, 115, 218, 73, 118, 140, 311,
  > and 118
  > trev <- data.frame(r8 at cluster)
  > sqlSave(ch, trev, rownames="unitid")

  > in MySQL:
  > select r8cluster, count(*) from trev group by 1 order by 1   ## returns
  > cluster sizes of 51, 116, 217, 73, 117, 140, 312, 118

  > problem:
  > 4 of the 8 clusters differ in sizes. They're close but I'd think
they should
  > be exact.


Strange. What numbers do you get from

	 table(r8 at cluster)

? Which version of flexclust?

Best,
Fritz

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