Displaying 20 results from an estimated 1000 matches similar to: "igraph package, version 0.5"
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
2008 Mar 05
4
vertex labels in igraph from adjacency matrix
I am getting some unexpected results from some functions of igraph and
it is possible that I am misinterpreting the vertex numbers. Eg., the
max betweenness measure seems to be from a vertex that is not connected
to a single other vertex. Below if my code snippet:
require(igraph)
my.graph <- graph.adjacency(adjmatrix = my.adj.matrix, mode=c("undirected"))
most.between.vert <-
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
2008 Jun 26
1
Compilation error during package installation
Hi,
I am a Newbie for R. I just installed R-base on my notebook with
openSuSE 11. However, I always got compilation errors in installing
add-on packages. For example, when installing "igraph" I got the
following error:
___________________________________________________________________
* Installing *source* package 'igraph' ...
checking for gcc... gcc
checking for C compiler
2009 Feb 26
1
layout of igraph
Dear R users,
I am trying to draw a network using igraph package. I intend to place the
hub nodes (the ones with the relatively more connection with other nodes) in
the center of the graph. Also, the graph need to be in the fashion that the
higher the correlation between two nodes is , the closer the two nodes will
be. Is there any layout that can help or any other way to do this?
Thanks in
2006 Jun 29
1
initializing table and filling it out
Hi everyone,
I'm writting a script that will open multiple files in a single folder and then will do some calculations to finally save everything in a big table.
So here is the pseudo code
#read all files in the given directory
myfiles <-list.files("c:\\myDir")
#initialize table
???
#loop through files
for(f in myfiles[-1]) {
netMat <-
2008 Jul 18
1
Calculating Betweenness - Efficiency problem
Hello,
I am calculating 'Betweenness' of a large network using R. Currently, I have the node-node information (City1-City2) in an excel file, present in two columns where column A has City1 and column B has City2 that city1 is connected to. These are the steps that I go through to calculate betweenness of my network.
a) Convert the City1-City2 (text) into Number1-Number2 in the excel
2017 Mar 15
4
[Proposal][RFC] Epilog loop vectorization
On 03/14/2017 07:50 PM, Adam Nemet wrote:
>
>> On Mar 14, 2017, at 11:33 AM, Hal Finkel <hfinkel at anl.gov
>> <mailto:hfinkel at anl.gov>> wrote:
>>
>>
>>
>> On 03/14/2017 12:11 PM, Adam Nemet wrote:
>>>
>>>> On Mar 14, 2017, at 9:49 AM, Hal Finkel <hfinkel at anl.gov
>>>> <mailto:hfinkel at
2007 Dec 23
2
Problem with dyn.load'ed code
Hi,
I am having trouble with some code that I am dyn.loading. I am
writing an interface to ARPACK. I compile my interface (dssimp.cc), and
link it against the ARPACK library (libarpack_SUN4.a):
g++ -shared -static -fPIC dssimp.cc -o dssimp.so -larpack_SUN4 -lg2c -lm
I can dyn.load the code and it appears OK. However, when I call my
function, the call to the function in the ARPACK library
2012 Mar 09
1
Eigenvalue calculation of sparse matrices
Dear all,
I am currently working on the calculation of eigenvalues (and -vectors)
of large matrices. Since these are mostly sparse matrices and I remember
some specific functionalities in MATLAB for sparse matrices, I started a
research how to optimize the calculation of eigenvalues of a sparse matrix.
The function eigen itself works with the LAPACK library which has no
special handling for
2009 Dec 07
1
igraph plot - vertex colors
Hi everyone,
I have successfully created and analyzed my network data. I am new to R, and Network Analysis too, but I want to color my vertex based on some of the centrality measures calculated.
Can someone point me in the right direction? Again, I am new to R, but given how powerful R appears to be, I figure this is probably pretty easy to do, I just wish I could figure it out.
Many thanks
2009 Mar 05
0
Undirected to Directed Graph ( Clustering Based on Link Strength)
Hello All,
I went through lot of searching for papers to do clustering on
Co-Authroship.I ran SNA metrics on my Undirected
Graph(betweenness,Closeness,Eigen Vector) using R.
After running the sna Metrics I found important nodes and did clustering on
those nodes based on Binding strength .This clustering is done through if
they are connected.I would like to do clustering based on Weight of the
2011 Oct 21
0
Kleinberg's burst detection algorithm
Has anyone here implemented Jon Kleinberg's burst detection algorithm
("Bursty and Hierarchical Structure in Streams"
http://www.cs.cornell.edu/home/kleinber/bhs.pdf)?
I'd rather not reimplement if there's already running code available....
Thanks,
-s
[[alternative HTML version deleted]]
2017 Mar 14
4
[Proposal][RFC] Epilog loop vectorization
On 03/14/2017 12:11 PM, Adam Nemet wrote:
>
>> On Mar 14, 2017, at 9:49 AM, Hal Finkel <hfinkel at anl.gov
>> <mailto:hfinkel at anl.gov>> wrote:
>>
>>
>> On 03/14/2017 11:21 AM, Adam Nemet wrote:
>>>
>>>> On Mar 14, 2017, at 6:00 AM, Nema, Ashutosh <Ashutosh.Nema at amd.com
>>>> <mailto:Ashutosh.Nema at
2010 Sep 30
0
igraph / eigenvector centrality score
Hi to all,
I have two graphs with the same number of nodes but with different
connectivities and also with a different number of clusters.
The two graphs represent the same "system" under different "conditions" and
then there is a one-to-one correspondence between a given node in the two
graphs.
It is correct to use the eigenvector centrality score as a measure of the
relevance
2006 Mar 01
2
Weighted networks and multigraphs
I would like to apply network measures (such as betweenness centrality,
upper boundedness, etc.) to a weighted graph with non-integer weights,
defined by a euclidean distance matrix. The package sna provides the
measures that I want to use, but seems only to operate on binary graphs.
I have read work by Mark Newman
(http://aps.arxiv.org/abs/cond-mat/0407503/), who suggests that a
weighted graph
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,