[R] method default for hclust function

[David Carlson]

I think the OP was asking about the agglomeration method in
hclust(), not the distance measure in dist(). And the default in
dist() is not absolute distance which is not an option, but
Euclidean distance:

> dist(cbind(v, v))
         1        2        3        4        5
2 1.414214                                    
3 2.828427 1.414214                           
4 4.242641 2.828427 1.414214                  
5 5.656854 4.242641 2.828427 1.414214         
6 7.071068 5.656854 4.242641 2.828427 1.414214

For a single vector (column) such as v <- 1:6, Euclidean,
Manhattan, Maximum, and Minkowski will all give the same result.

-------------------------------------
David L Carlson
Department of Anthropology
Texas A&M University
College Station, TX 77840-4352

-----Original Message-----
From: r-help-bounces at r-project.org
[mailto:r-help-bounces at r-project.org] On Behalf Of eliza botto
Sent: Thursday, December 12, 2013 5:15 PM
To: capricy gao; r-help at r-project.org
Subject: Re: [R] method default for hclust function

Absolute distance is the default distance in hclust.
v<-c(1,2,3,4,5,6)
dist(v)
2 1        
3 2 1      
4 3 2 1    
5 4 3 2 1  
6 5 4 3 2 1

Eliza

> Date: Thu, 12 Dec 2013 15:09:19 -0800
> From: capricyg at yahoo.com
> To: r-help at r-project.org
> Subject: [R] method default for hclust function
> 
> I could not figure out what was the default when I ran
hclust() without specifying the method.
> 
> For example:
> 
> I just have a code like:
> 
> hclust(dist(data))
> 
> Any input would be appreciated:)
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
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