Displaying 20 results from an estimated 3000 matches similar to: "igraph / eigenvector centrality score"
2008 Feb 20
0
igraph package, version 0.5
igraph is a package for graphs and networks. It has a C core and
uses a simple and fast graph representation allowing millions
of vertices and edges.
NEW FEATURES:
- We use the ARPACK library for graph related eigenvalue problems,
like Page Rank calculation, Kleinberg's hub and authority scores,
eigenvector centrality, etc. There is also a generic interface
if someone wants to use
2008 Feb 20
0
igraph package, version 0.5
igraph is a package for graphs and networks. It has a C core and
uses a simple and fast graph representation allowing millions
of vertices and edges.
NEW FEATURES:
- We use the ARPACK library for graph related eigenvalue problems,
like Page Rank calculation, Kleinberg's hub and authority scores,
eigenvector centrality, etc. There is also a generic interface
if someone wants to use
2012 Jun 18
0
igraph 0.6 released
Dear All,
we have released version 0.6 of the igraph package today. This is a
major new version, with a lot of new features, and (sadly) it is not
completely compatible with code that was written for the previous
igraph versions. (See "Major new features" below for details.)
I have included below a list of (bigger) changes. Please see the
details in the release notes and the NEWS
2012 Jun 18
0
igraph 0.6 released
Dear All,
we have released version 0.6 of the igraph package today. This is a
major new version, with a lot of new features, and (sadly) it is not
completely compatible with code that was written for the previous
igraph versions. (See "Major new features" below for details.)
I have included below a list of (bigger) changes. Please see the
details in the release notes and the NEWS
2009 Apr 18
0
igraph 0.5.2
igraph is a package for graphs/networks. It has a C core and
uses a simple and fast graph representation allowing millions
of vertices and edges.
LINKS
Release notes for the 0.5.2 version:
http://igraph.sourceforge.net/relnotes-0.5.2.html
Release notes for the 0.5.1 version:
http://igraph.sourceforge.net/relnotes-0.5.1.html
Complete list of changes:
http://igraph.sourceforge.net/news.html
The
2009 Apr 18
0
igraph 0.5.2
igraph is a package for graphs/networks. It has a C core and
uses a simple and fast graph representation allowing millions
of vertices and edges.
LINKS
Release notes for the 0.5.2 version:
http://igraph.sourceforge.net/relnotes-0.5.2.html
Release notes for the 0.5.1 version:
http://igraph.sourceforge.net/relnotes-0.5.1.html
Complete list of changes:
http://igraph.sourceforge.net/news.html
The
2011 May 05
1
Looping over graphs in igraph
Hi,
I'm trying to do some basic social network analysis with igraph in R, but
I'm new to R and haven't been able to find documentation on a couple basic
things:
I want to run igraph's community detection algorithms on a couple thousand
small graphs but don't know how to automate igraph looking at multiple
graphs described in a single csv file. My data look like something in
2004 Feb 12
1
left eigenvector
Dear All,
how do I compute the left eigenvector of a matrix? I gather that "eigen"
computes the right eigenvectors...
Regards,
Federico Calboli
--
=================================
Federico C. F. Calboli
PLEASE NOTE NEW ADDRESS
Dipartimento di Biologia
Via Selmi 3
40126 Bologna
Italy
tel (+39) 051 209 4187
fax (+39) 051 251 208
f.calboli at ucl.ac.uk
2008 Nov 30
1
about centralization
Hi all,
Is there anyone who ever used igraph to calculate the index of
"centralization" ?
I tried my best but can't find it in igraph.
The brief introduction to "centralization" can be found here , and I think
it's an important index for measuring the centrality on the aggregated
level.(http://faculty.ucr.edu/~hanneman/nettext/C10_Centrality.html)
Thank you for any
2010 Jun 12
1
Fast way to compute largest eigenvector
Hello all,
I was wondering if there is a function in R that only computes the eigenvector
corresponding to the largest/smallest eigenvalue of an arbitrary real matrix.
Thanks
Minh
--
Living on Earth may be expensive, but it includes an annual free trip
around the Sun.
2009 Apr 06
2
Bonpower Crashes Trying Sparse Matrix (Igraph)
Hello All,
I have been trying to do bonpow for a while now.Bonpow works for few graphs
and for few others it goes out of memory.
I did see reply to one of the posting Alph Centrality Crashed in Igraph
memory error.
The solution in the posting was to use sparse matrix. This is the link of
the message.
http://lists.gnu.org/archive/html/igraph-help/2008-04/msg00071.html
I was able to obtain
2009 Apr 23
1
the definition of eigenvector in R
Dear All
i have a little puzzle about eigenvector in the R.
As we know that the eigenvector can be displayed on several form.
For example
A=matrix(c(1,2,4,3),2,2)
if we want to get the eigenvalue and eigenvector, the code followed
eigen(A)
$values
[1] 5 -1
$vectors
[,1] [,2]
[1,] -0.7071068 -0.8944272
[2,] -0.7071068 0.4472136
however, we also can calculate the vector matrix
2012 Jul 24
1
igraph build problems
Hello:
I've been trying for days now to get igraph working on a debian sarge
install. There does not appear to be any pre-built packages, and when
I try and install within R, it blows up on the final linking, claiming
its unable to find libgfortran (which IS installed, and IS working for
all other users of the compiler).
I started up R and ran: install.packages("igraph"). It
2009 Apr 24
1
the puzzle of eigenvector and eigenvalue
Dear all
I am so glad the R can provide the efficient calculate about
eigenvector and eigenvalue.
However, i have some puzzle about the procedure of eigen.
Fristly, what kind of procedue does the R utilize such that the eigen
are obtained?
For example, A=matrix(c(1,2,4,3),2,2)
we can define the eigenvalue lamda, such as
det | 1-lamda 4 | =0
| 2 3-lamda |
then
2017 Aug 03
1
error in installing igraph
Hi R users,
I got warning messages when installing the package, and I pasted the
messages below. I checked updates that my R-studio is already the newest
version. I don't know how to solve the problem. Thanks for your help.
> library(igraph)
Error in dyn.load(file, DLLpath = DLLpath, ...) :
unable to load shared object
2008 Jan 08
1
loading igraph package on Solaris
Hello,
I'm having trouble getting the igraph package to load on Solaris. I
can get igraph to compile and install from a local directory without
issues using simply "R CMD INSTALL igraph", however "library(igraph)"
from within R gives the following errors:
Error in dyn.load(x, as.logical(local), as.logical(now)) :
unable to load shared library
2009 Oct 12
0
function: ploting an igraph object within lattice
Hi, I would like to be able to develop a function to plot an igraph object
with lattice (trellis type displays will be usefull for grouping etc).
Anyway, I mostly feeble
Igraph requires that you convert two columns of data two an igraph object
and to be able to plot the graph...I have tried a very, very simplistic (if
not naive) approach and surprise, surprise, it didn't work.
First of all,
2013 Apr 21
1
cedta decided 'igraph' wasn't data.table aware
Hi, what does this mean?
--8<---------------cut here---------------start------------->8---
> graph <- graph.data.frame(merged[!v,], vertices=ve, directed=FALSE)
cedta decided 'igraph' wasn't data.table aware
cedta decided 'igraph' wasn't data.table aware
cedta decided 'igraph' wasn't data.table aware
cedta decided 'igraph' wasn't
2017 Oct 11
0
Cannot install igraph package
Hello,
Could you please test the solution at
https://stackoverflow.com/questions/45318188/getting-error-in-function-igraph-write-graph-graphml-while-installing-igrap
Specifically -
install.packages("devtools")
library(devtools)
install_github("igraph/rigraph")
Please let us know if this works
Regards,
-- Saint Pai
On Tue, Oct 10, 2017 at 01:40:53AM +0100, Paul Smith
2010 Jun 23
1
Trouble compiling igraph. . .
Been and R-user for about 5 years now in an industrial setting, and
always find the mailing list most helpful. I have run into problem
compiling igraph on R. I have contacted the maintainer of igraph, and
he has determined that it is not an igraph problem.
System is FreeBSD 7.2, R-2.10.1 [also have a sandbox machine running
FreeBSD 7.3, R-2.11]. Both machines fail the installation of igraph.