Displaying 20 results from an estimated 10000 matches similar to: "unix.time"
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 <-
2008 Mar 12
2
subset list based on logical within element flag
I have a very long list that I'd like to subset based on a logical value
within each element. Example below. I'd like to get just those list
elements for further study whose $sig.cor slot is TRUE. In this example,
I'd only want element [[2]].
Should be simple, I know. How can I do this? Thanks, Mark
> gene.pair.tf.lst
[[1]]
[[1]]$gene.pair
[1] "Lgals1:Pxmp2"
2008 May 06
3
rggobi is crashing R-2.7.0
I am running 64-bit Ubuntu 8.04 and when I invoke rggobi the interactive
graph displays but R crashes. See my sessionInfo() and a short example
below. Ggobi and rggobi installed without complaints. Mark
> sessionInfo()
R version 2.7.0 Patched (2008-05-04 r45620)
x86_64-unknown-linux-gnu
locale:
2007 Oct 30
6
trouble installing building packages from source using R 2.6.0 on Ubuntu Gutsy AMD64
I have recently upgraded to Ubuntu Gutsy and, for the first time, am
using a 64-bit installation. After failing miserably to install R from
source, not a problem for me in the past with a 32-bit install, I went
the route of using the Debian Etch build. This went smoothly, but I am
unable to update my numerous R and BioConductor packages, getting
non-zero exit status errors on each package. Is
2008 Feb 07
1
help with R rendering engine
I'm doing some work on a potential patch to the Bioconductor package
Rgraphviz and have some questions on code that is contained in engine.c.
In particular, I am developing some custom shapes using polygon and need
to make sure that, with rendering, the line connecting the centers of
two polygons stops at the border of each polygon. The polygons can be
transparent, so the option of just
2001 Feb 24
5
testing for integer
Dear People,
Consider the following fragment of R code
choose <- function(n,r)
{
if( is.integer(n) && is.integer(r) && n > 0 && r >= 0 )
{
.C("choose",as.double(n),as.double(r),comb = double(1))$comb
}
else stop("n must be a positive integer and r a non-negative integer.")
}
This is a practice function (n choose r), which I
2008 Apr 30
3
checking whether a file is empty
Hi,
Is there a way to check whether a file is empty in R. I did the customary
searches, but did not find anything. Please cc me on any reply.
Thanks, Faheem.
2003 Apr 29
4
thick plot lines
Dear People,
In a qqplot I am doing, I get lines/points that are very thick. I've tried
setting the lwd variable to 0.1, but it doesn't seem to have any effect.
Also, I have set the value of lty to dashed, but I still get dots. The
command looks like
qqplot(cdf.inv(seq(0,1,length=size),theta,pos,len),empmargdistvec(len,theta,pos,size),
xlim=c(-theta,theta), ylim=c(-theta,theta),
2008 Aug 06
3
subsetting with column name as string
Hi,
Consider the following
> x = c(1,2)
> y = c(3,4)
> d = data.frame(cbind(x,y))
> d$x
[1] 1 2
> d$"x"
[1] 1 2
>
> foo = function(val)
+ {
+ return(d$val)
+ }
>
> bar = function()
+ {
+ return(d$"x")
+ }
>
> foo("x")
NULL
> bar()
[1] 1 2
I'm a little surprised that R accepts both the form d$x and d$"x", but
2001 Feb 08
4
eps file not positioned properly in latex document
Dear People,
I am trying to include a barplot (see code below), in a latex document.
However, the plot appears in totally the wrong position. I know this is
not an R question as such, but the eps file is produced by R and I thought
that perhaps other people had had similar problems and could give me
pointers. Am I doing anything obviously wrong?
Sincerely, Faheem Mitha.
PS.
2008 Oct 17
1
how to list variables enclosed in an environment
I'm having trouble with a Bioconductor package, an variable expected in an
environment does not seem to be there. As part of my investigation of the
problem (most likely on my end) I'd like to list the variables contained in
an environment. If you have an environment loaded, lets call it "pkgEnv',
how does one find what it does contain? Mark
2000 May 01
6
including r code in a latex file
Dear R people,
The header practically says it all. I was wanting to include r code in a
Latex file. Since R code using{ and }, which are interpreted by Latex as
control characters, I would expect it to get upset.
I believe that \{ would probably print as {, but I hoping I don't have to
go through the code and add lots of \. I would rather use some global
commannd, along the lines of
2008 Mar 05
1
connectivity measure for graph nodes
I am doing some work the Rgraphviz, a Bioconductor package, but since my
question is of a more general nature, thought I would send to this list
in hopes that a graph theory expert could answer my question.
I wish to do some statistics on node-node relationships. In particular,
I want to see if two connected nodes share a common property. I believe
that the more "connected" the two
2001 Mar 14
2
concatenating lists
Dear People,
I have been trying to perform concatenation operations on lists without
success. Consider the following example.
> x <- runif(2)
> y <- runif(2)
> z <- runif(2)
> xy <- list(x,y)
> xyz <- list(x,y,z)
I want to have a function foo such that foo(xy,z) is the same as xyz. This
appears not to be as easy as I thought, though there must be a way.
For example
2001 Nov 17
2
choosing g/g++ compiler executable in R CMD SHLIB
Dear People,
After considerable effort, I managed to install gcc-3.0 on my Debian
system. However, Debian keeps gcc-2.95 around as the default compiler, and
gcc, g++ point to the 2.95 version. The 3.0 versions need to be explicitly
invoked as gcc-3.0, g++-3.0 etc. How can I get R CMD SHLIB to invoke
gcc-3.0 instead of gcc and g++-3.0 instead of g++? I would like this to be
done by default but
1999 Dec 16
2
R question
I have the following question, which is elementary but I am unable to
answer.
In a for(i=10) loop, I am trying to represent the 10 1-dimensional vectors
l1, l2,... l10 by some expression that will run through these values.
ie. soppose I want to add l1 + ... + l10
I could go
x <- 0
for(i in 1:10){ x <- x+ l(i)}
This should return x to be the sum of the 10 li's for i from 1 to 10
2009 Aug 20
5
help with regular expressions in R
I'm having trouble achieving the results I want using a regular expression.
I want to eliminate all characters that fall within square brackets as well
as the brackets themselves, returning an "". I'm not sure if it's R's use of
double slash escapes or something else that is tripping me up. If I only use
one slash I get
1: '\[' is an unrecognized escape in a
2001 Sep 23
1
plot with no tick marks
Dear R people,
I have the following simple bit of code to make a plot. I want to suppress
tick marks on the axes of the plot. I've been trying everything I can
think of to do so, but have been unsuccessful. Can you help me? If you
reply, please cc me, I'm not currently subscribed to the list.
Thanks in advance.
Sincerely, Faheem Mitha.
num <- 1:i
inc
2003 Jun 20
3
combining mathematical notation and value substitution
Dear People,
I need to make a label which both contains math notation as well as
substitutes a value for an object. In the following label, len and theta
are one dim variables, and I am substituting their values appropriately.
This label looks fine except that I want the greek symbol for theta to
appear instead of the word `theta'. How can I do so most easily? I don't
understand the
2001 Oct 18
1
rsync logging and permission problems
Dear rsync people,
I have just started using rsync for backups. I have had a couple of
issues. Note I'm trying to use rsync as user using ssh between two
machines both running Debian GNU/Linux potato (2.2r3). The local machine
is currently running 2.4.6-1 and the remote 2.3.2-1.2.
1) When I run rsync with the vv option, stuff scrolls of my screen faster
than I can read it. I was wondering if