Displaying 20 results from an estimated 10000 matches similar to: "using nrow to identify one row"
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 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 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):
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 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
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
--
Ihr Partner f?r Webdesign, Webapplikationen und Webspace.
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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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 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
2009 Apr 06
5
Search for a graph package - see link
Hi to all,
does anybody knows whether there is a package to plot those
http://www.equine-science.de/temp/graph.jpg
graphs.
the thickness of the points and/or the lines should be represent the
numbers of behaviours
With kind regards Knut
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 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 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 <-
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
2008 Feb 12
4
0.45<0.45 = TRUE (PR#10744)
Dear developer,
in my version of R (2.4.0) as weel as in a more recent version (2.6.0)
on different computers, we found this problem :
> a<-(58/40-1)
> a
[1] 0.45
> b<-(18/40)
> b
[1] 0.45
> a<b
[1] TRUE
> a==b
[1] FALSE
>
Something seems wrong here.
but if we do
> c<-0.45
> d<-0.45
> c<d
[1] FALSE
then everything is ok.
If we use 59
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
2008 Mar 20
3
download webpage in R
Hi, everyone
I want to download a XML webpage and save it as a file in my local machine.
Is there any way to do it in R?
Thanks a lot
Gilbert
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2008 Mar 14
3
test individual values in rows
Hi list.
I have a numerical dataset 22,000 rows deep and 43 columns wide. I would like to remove those rows which contain only values less than 100 (ie if any value in the row is greater than 100 the row stays in the dataset). I am unsure how to test each individual value across the rows and then identify the rows which meet my criteria.
Can anyone help?
Thank you.
Iain
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