[R] How to make a Cluster of Clusters

Michael Bedward michael.bedward at gmail.com
Sat Jan 8 06:53:39 CET 2011

Hi Diego,

It depends on your what your research questions are.  You haven't told us :)

For example, if you wanted to know whether (a) the environmental
distance between lakes is correlated with spatial distance and (b) if
the relationship changes over time you might do a series of Mantel
tests. This would be working with your environmental and spatial
distance matrices directly, rather than indirectly as is the case with
dendrogram ultrametrics or ordination coordinates.


On 8 January 2011 00:02, Diego Pujoni <diegopujoni at gmail.com> wrote:
> Hi Michael,
> I agree with you and I will make this ordination. But I also want to
> check a spatial correlation of the variables, so I thought that
> comparing the dendrogram of the environmental variables with the
> dendrogram of the geographical distances of the lakes it will
> indicates if similar lakes are next to each other. But I have just one
> geographical coordinate for each lake, but 12 measures of
> environmental variables. How can I analyse this?
> Thank you very much for the attention
>    Diego PJ

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