Hello Martin,
Thank you for replying.

I have two needs:
1) To merge two dendrograms into one.
2) To then run cutree on it (which works on hclust, but not on dendrogram).

I guess that if I knew how to perform both steps I would be able to do what
I'm trying to do on my data.
If nothing like this currently exists, I guess I'll simply implement a
method of cutree for a dendrogram, and see how to merge two dendrograms
together.

Best,
Tal




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On Wed, Dec 29, 2010 at 1:23 PM, Martin Maechler <maechler@stat.math.ethz.ch
> wrote:

> >>>>> "TG" == Tal Galili <tal.galili@gmail.com>
> >>>>>     on Mon, 27 Dec 2010 23:34:33 +0200 writes:
>
>    TG> Hello all, I'm now working with hclust objects and was
>    TG> hoping to perform some basic editing on them like:
>
>    TG>    - Joining = the merging of two hclust objects (so
>    TG> they will share one root) - Splicing = So to cut/extract
>    TG> a branch out of an hclust object - that by itself will
>    TG> be an hclust object.
>
>    TG> I noticed I could extract one element of an hclust
>    TG> object by turning it into a dendrogram, but that doesn't
>    TG> enable me to turn it back into an hclust object.
>
> Why should you "turn it back" ?
> What do you want to use them for
>
> The intent of the "dendrogram" has been that it is more flexible
> (and more general) than "hclust" and can be printed, plotted,
> manipulated, ... better than hclust ones.
>
> Regards,
> Martin Maechler, ETH Zurich
>
>
>    TG> Are there any functions that can aid with this?  Maybe
>    TG> through the ape package and the phylo objects?
>
>    TG> Thanks, Tal
>

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