Displaying 20 results from an estimated 4000 matches similar to: "sna package: how to import data in linked list format"
2006 Apr 23
1
sna package: how to use dataframes
Hi,
I an new to R and I realize this may be a silly question, but I searched the manuals and the list archives and can't find the answer.
When I read data from R I get a dataframe with labels for rows and columns. SNA however asks for pure adjacency matrices, and if I try to use the dataframe gives an error message.
What should do?
Thanks a lot
Jorge A. Colazo
U. of Western Ontario
2006 Oct 31
2
information about sna packages
Hello,
I'm a student who want to use the R social network analysis package. I have
a question: can this package analyse dynamical networks (network changing
over time)? I didn't find this functionality in the package's user manual.
Thank you
Davide
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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
2007 May 09
3
Removing a list of Objects
Hi,
I have a simple beginner's question on removing a list of
objects. Say I have objects C243.Daily1, C243.Daily2...C243.Daily5 in my
workspace. I'd like to remove these without using rm five times.
So I write.
> a <- list(paste("C243.Daily",sep="",1:5))
> rm(a)
Obviously this wouldn't work, as it would only remove the object a.
But is there any way
2007 Feb 13
4
Advice on visual graph packages
Hey, all. I'm looking for packages that are good at two things
1) Drawing directed graphs (i.e nodes and edges), both with single
and double headed arrows, as well as allowing for differences in line
width and solid versus dashed. Note: I've tried Rgraphviz here, but
have run into some problems (which seem fixable and I may go with it
in the end), and it doesn't satisfy need
2007 Aug 28
4
Nodes & edges with similarity matrix
Hello,
I apologise if someone has already answered this but I searched and
googled but didn't find anything.
I have a matrix which gives me the similarity of each item to each
other. I would like to turn this matrix into something like what they
have in the graph package with the nodes and edges.
http://cran.r-project.org/doc/packages/graph.pdf . However I cannot find
a method to
2008 May 09
3
For Social Network Analysis-Graph Analysis - How to convert 2 mode data to 1 mode data?
Hi,
Does anyone know of a package in R that has a function to convert
network data (e.g. an adjacency matrix or ) from 2-mode to 1-mode? I am
conducting social network analysis. I know that Pajek has this function
under Net --> Transform --> 2-mode to 1-mode --> Rows. I have searched
the documentation under packages 'sna', 'network', 'igraph', and
2007 Oct 08
2
graph or svn
Hello all,
I'm having a spot of trouble. I have made a very nice distance
matrix from some comparison calculations. However, the matrix is 3096 x
3096, so it's relatively large. Currently I'm using the svn package as
it seems to work for my data. The graph package errors and says the
"adjacency matrix must be symmetric for undirected graphs". I though
3096 x 3096 was
2006 Feb 15
1
power law
Dear list,
Does anyone know how to fit the power law distribution?
I have the empirical distribution and would like to check whether it fits
power law (with the power estimated from the data).
Any hints are appreciated
Best regards
Galina
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2007 Sep 14
6
replace NA value with 0
Hi,
how can I replace NA value with 0:
1991 217 119 103 109 137 202 283 240 146 NA
1992 270 174 149 144 166 239 278 237 275 NA
1993 146 111 104 89 98 131 153 148 175 NA
1994 177 123 146 124 121 200 266 191 240 106
1995 145 98 95 89 95 130 183 161 164 129
1996 145 98 89 90 93 138 158 131 161 161
1991 217 119 103 109 137 202 283 240 146 0
1992 270 174 149 144 166 239 278 237
2008 Dec 26
2
question about SNA in R, thanks!
Dear colleagues,
I'm trying to have a look at the Assortative and Disassortative (
http://en.wikipedia.org/wiki/Assortative_mixing) of the network I have.
But it seems that the igraph hasn't mentioned that yet.
I have to get the in/out degree of the vertices of each edge and calculate
the Pearson's Correlation coefficient which seems to be quite a huge task
for me. :(
So I wonder if
2007 Feb 22
1
how to install a package in R on a linux machine?
I downloaded the tar.gz file from r-project website (and saved it in a local
directory) and wish to use the package in R.
But I am not sure how to use the install.packages command. I tried a few
times and still couldn't figure out the correct way to install this package.
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2007 Oct 27
2
How to generate all permutation of 0-1 sequences in R?
Hi, folks:
I need to generate all 0-1 sequences with given length,say,n=3, the ideal
result would be
the following matrix:
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
Any help would be appreciated.
--
View this message in context: http://www.nabble.com/How-to-generate-all-permutation-of-0-1-sequences-in-R--tf4704377.html#a13446919
Sent from the R help mailing list archive at Nabble.com.
2008 Jan 05
2
Cumulative sum of vector
Hi,
Maybe I have not been looking in the right spot, but, I have not been
able to fine a command to automatically calculate the running
cumulative sum of a vector. Is there such a command?
Example of current code:
> eig$values
[1] 678.365651 6.769697 2.853783
> prop<-eig$values/sum(eig$values)
> prop
[1] 0.986012163 0.009839832 0.004148005
>
2006 Jan 27
3
substituting an object not found
Is there any function in R like
is.not.found(x, y)
meaning if you can't find object x, then use object
y??
Mikkel Grum
2006 Apr 23
1
converting similarity matrix formats
Dear all,
I am using a program that generates similarity matrices in the following
non-redundant pairwise format.
a b 0.4
a c 0.5
a d 0.3
b c 0.9
b d 0.6
c d 0.2
matrix(c('a','a','a','b','b','c','b','c','d','c','d','d',.4,.5,.3,.9,.6,.2),byrow=F,nrow=6)
I would like to convert this to a
2006 Apr 28
1
displaying numbers not in scientific notation
Sorry for asking such a simple question, but I couldn't find the
answer through a search...
How can I get R to show me the values of estimates *not* in scientific notation?
When I use summary() after using lm() I am getting numbers like
4.485107e-01, when what I want to see is 0.4485....
Thanks,
Brian
2006 Jun 15
1
more function in R?
I'm an R newbie and I just have a simple question.
I'm using interactive R on a linux box and I'm trying to find out if there's
a more or a less function. The data I want to look at is larger then my
screen size and all I end up seeing is the last fews line of data. Is there
a way that I can paginate through the data and the results of my summary
functions?
thanks,
Heidi
2006 Jun 29
2
R server
Hi,
I just installed R in Windows, it seems to me that R is a standalone
desktop application. Do you know if R has its server version which could
handle multi-users, have several distinct R sessions and their own
variables in Unix or Windows?
I saw OpenStatServer, RStatServer available, can those handle
multi-sessions?
Thanks
Mike
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2006 Aug 22
2
Rgraphviz installation Problem
Dear Robert,
Thanks for your time.
I have downloaded Rgraphviz (windows binary) from www.bioconductor.org
and put inside R2.3.0 library then i installed from the local zip
its says package 'graph' couldnot be loaded.
Am i doing the installation correctly? Still the new user.
Can you guide me sir?
JJ
--
Lecturer J. Joshua Thomas
KDU College Penang Campus
Research Student,
University