Displaying 20 results from an estimated 7000 matches similar to: "I'm offering $300 for someone who know R-programming to do the assignments for me."
2009 Mar 06
2
Highly Connected Nodes in Igraph
Hello R Help Team,
I have created graph from weighted adjecency matrix .Is there a way I can
find highly connected nodes in Igraph like the Package RBGL does.
nathan
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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
2009 Apr 30
3
Curved arrows
I'm trying to draw an arrow with a curved shaft on the graph as a straight
one looks messy on a detailed graph. I've looked in arrows but it doesn't
seem to give an option. larrows doesn't look much more promising. I had a
look in the archive and couldn't find anything. Any thoughts?
Thanks
Paul
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2009 Apr 07
2
Minimum Spanning Tree
Hi all, I'm very new to R and read a few tutorials, however I'm having
difficulty trying to figure out how to plot a minimum spanning tree. I have
a csv file that contains an n-by-n matrix of distances between strains of
bacteria called matrix.csv.
Looks like:
id,strain1, strain2,strain3
strain1,0,.2,.8
strain2,.3,0,.7
strain3,.4,.6,0
I've been messing around with some information
2010 Jun 21
4
S3 generics need identical signature?
Dear all,
"Writing R Extensions" explicitly says that
A method must have all the arguments of the generic, including ...
if the generic does.
A method must have arguments in exactly the same order as the generic.
If the generic specifies defaults, all methods should use the same
defaults.
This is clear. R CMD check even checks for this.
But then how is it possible that
2008 Feb 11
4
Conditional rows
Hi,
Given a simple example, test <- matrix(c(0.1, 0.2, 0.1, 0.2, 0.1, 0.1, 0.3,
0.1, 0.1), 3, 3)
How to generate row indexes for which their corresponding row values are
less than or equal to 0.2 ? For this example, row 2 and 3 are the correct
ones.
Thanks
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2008 Jul 11
2
network
Hello
I am a relatively new user of R and am struggling to use the 'network' package. I have a correlation matrix (produced using 'cor'), and want to draw a network where each item showing correlation above a threshold (say 0.5) is joined by a green line, and each item showing correlation below a threshold (say -0.5) is joined by a red line. Does anyone have any hints of how to
2008 Feb 01
2
re placing values in a matrix
useR's,
Consider:
y <- c(20, 25, 30)
> m <- matrix(c(0.0,1,NA,0.5,1.25,0.75, 0.5, NA,
> NA),byrow=TRUE,nrow=3,ncol=3)
> m
[,1] [,2] [,3]
[1,] 0.0 1.00 NA
[2,] 0.5 1.25 0.75
[3,] 0.5 NA NA
For each numeric value, I want to replace them with their corresponding
y-value. The result should look like (here, each row represents a variable
rather than the columns):
2009 Sep 04
2
Running R on read-only file system, without temporary directory
Dear All,
I would like to do run R without having write permissions to any
directory on the system. It seems that I need to modify the R source
code for this, to make R start without creating a temporary directory.
So far, so good. But should I expect any more complications? Does R
really need the temporary directory that much?
Thanks,
Gabor
--
Gabor Csardi <Gabor.Csardi at unil.ch>
2008 Oct 22
1
Think I'm sure, but confirm: lme4 vs. nlme
The impression I get from the list and the references I've perused is
that nlme is being phased out in favor of lme4, but lme4 still doesn't
have a complete feature set yet.
What I'm still fuzzy on, being a relative R newbie, is:
(a) what features in nlme are currently missing in lme4
(b) what's the projected time frame on getting them implemented.
If anyone can answer my naive
2008 Feb 18
2
library(convert)
Hallo,
I am running R-2.6. on Windows. I have a code which uses
library(convert). Can anyone tell me which package I need to install to
run this code. Everytime I receive the error message library (convert)
not found.
Thanks, Corinna
2009 Jan 09
1
snow and different R versions
Dear Luke and others,
I have many R versions on my machine and want to start a particular
one when snow builds its cluster. (The same version I start snow
from.) It seems that everything is set up correctly in
defaultClusterOptions:
> mget(ls(defaultClusterOptions), defaultClusterOptions)
$homogeneous
[1] TRUE
$manual
[1] FALSE
$master
nodename
"maya.unil.ch"
$outfile
[1]
2008 Jan 11
2
Count unique rows/columns in a matrix
Dear List,
i know there are some solutions for this in the archive,
but they're not very good for numeric matrices, since they
usually convert rows/columns to character strings. Is there
an easy way to do $subject for numeric matrices properly,
or i need to do it by hand?
Thanks,
Gabor
2008 Jan 26
3
Which R version created a package?
Greetings, R-ians:
I would like to know which version or R was used to create a given package.
I think I remember seeing that topic discussed recently but cannot find it
among my notes. Can anyone tell me how to determine which version of R
created a package?
Thanks.
Charles Annis, P.E.
<mailto:Charles.Annis@StatisticalEngineering.com>
Charles.Annis@StatisticalEngineering.com
2008 Jan 14
3
problems with .svg
Dear everybody!
I am making a graph in R and employ pstoedit to expot the .pdf-output
to .svg.
When I open the .svg with firefox I get the .svg-code shown wit the
following header:
"Mit dieser XML-Datei sind anscheinend keine Style-Informationen
verkn?pft. Nachfolgend wird die Baum-Ansicht des Dokuments angezeigt."
Which information should how be included?
Thank you in advance.
Yours,
2008 Mar 04
4
R-Terminal
Hi there!
I use an gnome-terminal for using R. When I resize the termial to the
maximum size, R uses only the left side of the window. Can I tell R to
use the whole window somehow?
Thanks,
Martin
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http://www.roomandspace.com/
Martin Kaffanke +43 650 4514224
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2008 Jul 08
4
Can R do this ?
I have a folder full of pngs and jpgs, and would like to consolidate them into a pdf with appropriate title and labels. Can this be done via R ?
_________________________________________________________________
Easily publish your photos to your Spaces with Photo Gallery.
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2009 Oct 21
4
random numbers between 0 and 1
Hi,
To generate random numbers between 0 and 1, do you use rnorm followed by dnrom? for ex, for 10 variables
a = rnorm(10)
> a
[1] -0.87640764 -0.95842391 -1.33434559 -0.63844932 -1.69829393 0.80010865
[7] -0.01026882 -0.23887516 2.29912600 -1.38352143
> dnorm(a)
[1] 0.27171985 0.25202507 0.16378878 0.32538464 0.09432211 0.28966637
[7] 0.39892125 0.38772103 0.02838403 0.15320103
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
2009 Feb 18
4
Inaccurate result for 0. (PR#13538)
Full_Name: Attila Lengyel
Version: 2.8.0
OS: WinXP
Submission from: (NULL) (81.182.224.160)
> -0.3+0.1+0.1+0.1
[1] 2.775558e-17