search for: agglomerate

Displaying 20 results from an estimated 24 matches for "agglomerate".

2013 Feb 22
1
Is it possible to obtain an agglomeration schedule with R cluster analyis
Hello, In SPSS the cluster analysis output includes an agglomerations schedule, which details the stages when cases are joined. Is it possible to obtain such output when performing cluster analysis in R? If so, I'd appreciate advice regarding how to obtain this information. Any assistance is appreciated, Regards Bob
2005 Nov 02
1
x/y coordinates of dendrogram branches
Dear R-users, I need some help concerning the plotting of dendrograms for hierarchical agglomerative clustering. The agglomeration niveau of each step should be displayed at the branches of the dendrogram. For this I need the x/y coordinates of the branch-agglomerations of the dendrogram. The y-values are known (the heights of the agglomeration), but how can I get the x-values? > mydata
2003 Dec 03
1
amap : hclust agglomeration
Hi, I'm trying to understand the complete linkage method in hclust. Can anyone provide a breakdown of the formula (p9 of the pdf documentation) or tell me what the "sup" operator does/means? thanks in advance Tom [[alternative HTML version deleted]]
2010 May 07
0
Cluster procedure using geographical neighborhood
Dear Dario Sacco, >>>>> "DS" == Dario Sacco <dario.sacco at unito.it> >>>>> on Thu, 06 May 2010 17:45:30 +0200 writes: DS> Dear Dr. Maechler, DS> I am an agronomist and a researcher at the University of Turin. I am DS> also teaching "Applied statistics", then I have some knowledge in DS> Statistics, but not
2006 Mar 09
1
HCLUST subroutine question -- FORTRAN DO loops
Shown below is most of the FORTRAN subroutine named HCLUST. My question concerns the DO loop labeled as '10'. What happened to its CONTINUE statement? I will assume that after FLAG(I)=.TRUE. is executed that control returns to DO 10 I=1,N. Am I correct? Dave ---------------------------- C Initializations C DO 10 I=1,N C We do not initialize MEMBR in order to be able to
2004 Jun 10
2
question about hierclust {multiv}
my major is bioinformatics, and i'm trying to cluster ( agglomerate the closest pari of observations ) in R. i have already got my own similarities metric, but do not know how to clust it based on similarities instead of dissimilarities. since the help document of hierclust mentions the parameter "sim", which seems good to me, but it doesn't appea...
2006 Feb 28
1
creating dendrogram from cluster hierarchy
Dear R users, I have created data for hierarchical agglomerative cluster analysis which consist of the merging pairs and the agglomeration heights, e.g. something like my.merge <- matrix(c(-1,-2,-3,1), ncol=2, byrow=TRUE) my.height <- c(0.5, 1) I'd like to plot a corresponding dendrogram but I don't know how to convert my data to achieve this. Is it possible to create a
2004 Jun 10
1
question about similarities cluster using hierclust
my major is bioinformatics, and i'm trying to cluster ( agglomerate the closest pari of observations ) in R. i have already got my own similarities metric, but do not know how to clust it based on similarities instead of dissimilarities. since the help document of hierclust mentions the parameter "sim", which seems good to me, but it doesn't appea...
2009 Dec 10
1
question about centroid-linkage (cluster analysis)
Dear R community, I would be greatful if somebody could shed light on the following. I have created a set of 6 points to check how centroid agglomeration works in cluster analysis: > Y <- data.frame(x=c(-1,1,1,-1,10,12),y=c(1,1,-1,-1,0,0)) It is quite intuitive to understand that the last clusters to be joined will be {1,2,3,4} with {5,6}. Now, the centroid for the first cluster has
2007 Jan 27
1
Conditional Selection of Columns for Tables
...00 meenie 200... Are these flat contingency tables? How can I get the results without much hazzle in one list/ table? i did read the ?ftable and what I was able to derive so far is: flat.df <- ftable(df[c("name", "revenue", "status")]) but I am unable to further agglomerate the data. hmpf. Good God, what would I do without my R-help forum? Thank you again Cheers and a relaxing weekend mark
2003 Dec 03
3
non-uniqueness in cluster analysis
Hi, I'm clustering objects defined by categorical variables with a hierarchical algorithm - average linkage. My distance matrix (general dissimilarity coefficient) includes several distances with exactly the same values. As I see, a standard agglomerative procedure ignores this problems, simply selecting, above equal distances, the one that comes first. For this reason the analysis in output
2017 Jan 16
2
Your help needed: List of LLVM Open Projects 2017
On Mon, Jan 16, 2017 at 2:31 PM, Davide Italiano <davide at freebsd.org> wrote: > On Mon, Jan 16, 2017 at 2:07 PM, Mehdi Amini <mehdi.amini at apple.com> > wrote: > > > > On Jan 16, 2017, at 1:47 PM, Sean Silva <chisophugis at gmail.com> wrote: > > > > > > > > On Mon, Jan 16, 2017 at 1:25 PM, Davide Italiano <davide at freebsd.org>
2017 Jan 16
2
Your help needed: List of LLVM Open Projects 2017
On Mon, Jan 16, 2017 at 3:34 PM, Sean Silva <chisophugis at gmail.com> wrote: > > > On Mon, Jan 16, 2017 at 3:32 PM, Sean Silva <chisophugis at gmail.com> wrote: > >> >> >> On Mon, Jan 16, 2017 at 2:31 PM, Davide Italiano <davide at freebsd.org> >> wrote: >> >>> On Mon, Jan 16, 2017 at 2:07 PM, Mehdi Amini <mehdi.amini at
2007 Nov 14
0
Question about AGNES by Rousseeuw et al. in the package "cluster": How many clusters?
Dear all, I am no stat wiz and I am just trying to use the AGNES algorithm at my very modest level of statistical of understanding. I have difficulties understanding the ouput from AGNES. My question is: how to interpret the output, especially how do you I know which cluster solution is the best? In SPSS, an Agglomeration Schedule table is produced and I used to look at the biggest jump between
2011 Nov 10
0
amap new version (multidimensional analysis)
Dear R users, Thanks to a new contributor, Luigi Cerulo, amap provides 2 more metrics, and another agglomeration linkage for distance computation, and hierarchical clustering. The new centroid linkage method implemented in the cluster3 software tool (http://bonsai.hgc.jp/~mdehoon/software/cluster/software.htm). In this method the pseudoitem of a cluster is computed as the average of the items
2017 Jan 17
4
Your help needed: List of LLVM Open Projects 2017
Would it make sense for xray instrumentation be part of -fprofile-generate? PGO will affect inlining decisions etc for the optimized binary, but the collected traces during the instrumented build would still have quite a bit of useful information. -- Sean Silva On Mon, Jan 16, 2017 at 4:33 PM, Xinliang David Li <xinliangli at gmail.com> wrote: > Google GCC records profile data (dynamic
2001 Jun 12
1
cophenetic matrix
Hello, I analyse some free-sorting data so I use hierarchical clustering. I want to compare my proximity matrix with the tree representation to evalute the fitting. (stress, cophenetic correlation (pearson's correlation)...) "The cophenetic similarity of two objects a and b is defined as the similarity level at wich objects a and b become members of the same cluster during the course of
2013 Dec 12
2
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]]
2017 Jan 17
2
Your help needed: List of LLVM Open Projects 2017
That’s a very good point, the X-ray data that would be useful for the linker should be collected from a "profile-use” build to be accurate. IIUC, that’d look like: build with profile-gen -> run benchmarks -> build with profile-use + Xray -> run benchmarks -> build with profil-use and feed linker with X-ray data for layout optimization. — Mehdi > On Jan 16, 2017, at 8:25
2017 Jan 16
4
Your help needed: List of LLVM Open Projects 2017
> On Jan 16, 2017, at 1:47 PM, Sean Silva <chisophugis at gmail.com> wrote: > > > > On Mon, Jan 16, 2017 at 1:25 PM, Davide Italiano <davide at freebsd.org <mailto:davide at freebsd.org>> wrote: > On Mon, Jan 16, 2017 at 12:31 PM, Sean Silva via llvm-dev > <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote: > > Do we