Re: [R] Clustering algorithms don't find obvious clusters

Thank you Etienne, this seems to work like a charm. Also thanks to the rest of you for your help. Henrik On 11 June 2010 13:51, Cuvelier Etienne wrote: > > > Le 11/06/2010 12:45, Henrik Aldberg a écrit : > > I have a directed graph which is represented as a matrix on the form >> >> >> 0 4 0 1

Re: [R] Clustering algorithms don't find obvious clusters

Henrik, the methods you use are NOT applicable to directed graphs, in the contrary even. They will split up what you want to put together. In your data, an author never cites himself. Hence, A and B are far more different than B and D according to the techniques you use. Please check out Etiennes

Re: [R] Clustering algorithms don't find obvious clusters

Henrik, Given your initial matrix, that should tell you which authors are similar/dissimilar to which other authors in terms of which authors they cite. In this case authors 1 and 3 are most similar because they both cite authors 2 and 4. Authors 2 and 3 are most different because they

Re: [R] Clustering algorithms don't find obvious clusters

Dave, I used daisy with the default settings (daisy(M) where M is the matrix). Henrik On 11 June 2010 21:57, Dave Roberts wrote: > Henrik, > >The clustering algorithms you refer to (and almost all others) expect > the matrix to be symmetric. They do not seek a graph-theoretic solution, >

Re: [R] Clustering algorithms don't find obvious clusters

Henrik, The clustering algorithms you refer to (and almost all others) expect the matrix to be symmetric. They do not seek a graph-theoretic solution, but rather proximity in geometric or topological space. How did you convert y9oru matrix to a dissimilarity? Dave Roberts Henrik Al

Re: [R] Clustering algorithms don't find obvious clusters

Le 11/06/2010 12:45, Henrik Aldberg a écrit : I have a directed graph which is represented as a matrix on the form 0 4 0 1 6 0 0 0 0 1 0 5 0 0 4 0 Each row correspond to an author (A, B, C, D) and the values says how many times this author have cited the other authors. Hence the first ro

[R] Clustering algorithms don't find obvious clusters

I have a directed graph which is represented as a matrix on the form 0 4 0 1 6 0 0 0 0 1 0 5 0 0 4 0 Each row correspond to an author (A, B, C, D) and the values says how many times this author have cited the other authors. Hence the first row says that author A have cited author B four time