similar to: subset list based on logical within element flag

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 <-

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:

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

I have a list (length 750), each element containing a vector of unique strings (unique gene ids), with length up to ~40 (median 15). I want to compile a matrix of all possible triplets and their frequency within gene elements. Using combn and a lot of looping, I am accomplishing this but it is VERY slow. I've tried to figure out a way to vectorize this, using "match" and

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

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

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

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

I have identical R.profiles and R_HOME directories set up on both my local machine and a remote linux cluster. To keep my libraries and R install separate, I use a site-library on both machines. The first line of my .Rprofile is: '.libPaths(new= "~/R_HOME/site-library") #tell R where site-library is' Until R-2.6.0 this was working fine on both machines, but since I have been

I am using grep to locate colnames to automate a report build and have run into a problem when a colname is not found. The use of integer(0) in a conditional statement seems to be a no no as it has length 0. Below is a self-contained trivial example. I would like to get something like "NA" or -1 for the position when it is not found OR learn a way to use integer(0) or some

I have used merge regularly and thought I understood how it worked, but I must not. I have two dataframes with identical colnames from two different experiments, TL01 and LC01. Each dataframe has a column named "Entrez.Gene", which I have converted to "as.character" just to make sure merge is not looking at factor levels. Because I have done some filtering, the Entrez.Gene

Is it possible to vectorize anova over the output of a vectorized lm? I have a gene expression matrix with each row being a gene and columns for samples. There are several factors with interactions. I can get p values by looping over the matrix with lm and anova, but I would like to make this as computationally efficient as possible. I am able to vectorize the lm command, but when I try to use

I need to write a table that can be opened in Excel or OpenOffice such that there are newlines embedded within cells. After much Googling and futzing, I can't figure out how to do this. The way to do this within Excel is alt-Enter and I've tried '/n', '/n/r', '/r/n' per some web suggestions without luck. Anybody know what character or ASCII code to use for this?

I am performing many permutations on a data-set with each permutation producing a variable number of results. I thought that the best way to keep track of all this in one object would be with a list ('res.lst'). To address these variable results for each permutation I attempted to construct this list using 'assign'. There is even more nesting than indicated below, but this is a

I have a vector of gene symbols, some of which have multiple aliases. In the case of an alias, they are separated by ' \\\ '. Here is a real world example, which would represent one element of my vector: Eif4g2 /// Eif4g2-ps1 /// LOC678831 What I would like to do is input the vector into a function and output a vector with just the first alias of each element (or, if there are no aliases,

After some struggling with the data format, non-standard in BioConductor, I have gotten cor.balance in package CORREP to work. My desire was to obtain maximum-likelihood p-values from the same data object using cor.LRtest, but it appears that this function wants something different, which I can't figure out from the documentation. Briefly, my dataset consists of 36 samples from 12

I have a very long list of strings. Each string actually contains multiple values separated by a semi-colon. I need to turn each string into a vector of the values delimited by the semi-colons. I know I can do this very laboriously by using loops, nchar, and substr, but it is terribly slow. Is there a basic R function that handles this situation? If not, is there perhaps a faster way to do it than

Hi, As far as I can tell, The R function unix.time calculates elapsed CPU time. Is there a command within R to measure actual elapsed time (I think this is sometimes referred to as wall time)? For example, the time command from GNU time calculates the actual elapsed time, as far as I can tell. (Please CC me, I'm not subscribed.)

I am using code that previously worked to remove stopwords using package "tm". Even manually adding "the" to the list does not work to remove "the". This package has undergone extensive redevelopment with changes to the function syntax, so perhaps I am just missing something. Please see my simple example, output, and sessionInfo() below. Thanks! Mark require(tm)

I just downloaded R-devel and when loaded it immediately segfaults. I'm not sure how much or what sort of diagnostic info and can provide, but below is my build script, my console output, and the output of uname -r. I am currently dependent on the development version of a package, so I'd like to get R-devel up and running if possible. I am sure there is more info I can provide, but before