R help - Aug 2008 - [dist]how to analise a large matrix?

Hi all,

I have a matrix of about 100.000?x 4?that I need?to classify using
euclidean metric. For that I am using dist?or daisy functions, but I
am afraid that the message: Error in vector("double", length) : vector
size specified is too large, means too much lines.

Can anyone suggest me how should I analyse this matrix?

Thanks in advance,

Diogo Andr? Alagador
MNCN,CSIC, Madrid, Spain
ISA, Lisbon, Portugal
?

On Thu, 21 Aug 2008, mcnda839 at mncn.csic.es wrote:
> Hi all,
>
> I have a matrix of about 100.000?x 4?that I need?to classify using
> euclidean metric. For that I am using dist?or daisy functions, but I
> am afraid that the message: Error in vector("double", length) :
vector
> size specified is too large, means too much lines.
>
Yes, your distance matrix will take dozens of Gigabytes to store.

> Can anyone suggest me how should I analyse this matrix?
Try something other than 'hierarchical clustering'.

See
 	http://cran.r-project.org/web/views/Cluster.html

for some suggestions.

kmeans(), perhaps ?

HTH,

Chuck
>
> Thanks in advance,
>
> Diogo Andr? Alagador
> MNCN,CSIC, Madrid, Spain
> ISA, Lisbon, Portugal
> ? ?
>
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Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
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