Hola! This can be done with the CRAN package igraph, which contains (part of) the arpack library for computing only some eigenvalues/eigenvectors of sparse matrices. arpack gives you the option of computing a few of the smallest or a few of the largest eigenvalues/vectors.
Do library(igraph) ?arpack Kjetil On Thu, Feb 2, 2012 at 12:29 PM, Massimo Franceschet <massimo.francesc...@uniud.it> wrote: > Hi. > > I am looking for a function in R for computing the Fiedler vector of a graph > (the eigenvector associated with the second smallest eigenvalue of the > Laplacian of the graph). Alternatively, I am searching for an efficient > method to compute just few eigenvalues/vectors of a matrix (the smallest). > > Many thanks. > > Massimo Franceschet > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
