similar to: function optimization: reducing the computing time

Dear Rusers, I tried to implement a function comparing mean scores between one subject (the patient) and a group a control subjects. The function returns attended results, but I also obtained the following warning : Warning message: the condition has length > 1 and only the first element will be used in: if (substr(fp, 1, 1) == "<") fp else paste("=", fp) Maybe

R users- In moving from R 2.0.0 to R 2.1.0 in Windows, I have encountered a problem with the "riwish" command in the package "MCMCpack". I've searched the documentation and can't seem to figure it out. For example: Define a matrix: > lam <- matrix(c(.00233,-.00057,-.00057,.00190),2,2) and then use the riwish command to generate a random inverse-Wishart

Hello Everyone Both the MCMCpack and the bayesm libraries allow us to make draws from the Inverse Wishart distribution. But I wanted to find out how exactly is the Inverse Wishart distribution parameterized in these libraries. The reason I ask is the following: Now its generally standard to express Inverse Wishart as IW(0.5 * DOF,0.5* Scale). (DOF-> Degree of freedom, Scale -> Scale

Hi, Have just recently downloaded R version 2.14.1 and can't install packages (Code below), 32bit version on windows. From the looks of things access is the problem but I don't know where to start, would it be my system that is the problem or is the repository not set up for the latest version yet? Any ideas on how to rectify the problem would be greatly appreciated Cheers >

I am looking for a good a - z matchers tutorial . Anyone got a url for one? Thanks Anthony Broad-Crawford -------------- next part -------------- An HTML attachment was scrubbed... URL: http://rubyforge.org/pipermail/rspec-users/attachments/20080303/fd652444/attachment-0001.html

Hi, I am new to R, so I am unsure of the formula to set up this analysis. I would like to run a linear model with a continuous dependent variable (brain volume) and a continuous independent variable (age) while controlling for a categorical nuisance variable (gender). Age and brain volume are correlated. There are no gender differences in age but there are significant gender differences in brain

I am trying to set up Samba for the very first time in my life on a SlackWare Linux 7.1 system. I'm using kernel 2.4.2, and the Samba 2.0.7 that comes precompiled with Slackware 7. I'm only moderately clueful at this point, but I have experience with other Linux and networking stuff. I can build Samba from sources if you think that would help. I ran through the diagnostic tests given

Dear expeRts, I would like to use a oneway_test (from package coin) to test whether two groups differ on various variables. The variables are encoded within a data frame. Unfortunately, I obtained an error, that I don't understand. Could you please help me ? Example: library(coin) y <- as.data.frame(matrix(rnorm(200), ncol=2)) group <- as.factor(unif(100)) lapply(y,

Dear R-users, I am wondering whether R implements a function returning the non central parameter of a t distribution (equivalent of the TnoncT function from SAS), given /x/ a value from a t distribution, /df /the degrees of freedom and /p/ the probability of x under this distribution. Thanks a lot, Matthieu -- Matthieu Dubois, /Ph.D/. /Student/ Cognitive Neuroscience Unit, UCL,

Is there any package that allow you to perform "MA plot" like graph for Toray microarray data? Unlike Affymetrix CEL file which contain 2 values (R and G), Torray raw data only contain 1 value. MA-plot is Affymetrix specific which usually available for in (limma) package. P. Dubois [[alternative HTML version deleted]]

Dear useRs, I have written a very simple function to compute some probabilities on words (function is below). The function includes a which() statement applied to a vector of characters (word.split): sapply (word.split, function(x) which(letters==x)). This statement worked as expected when used outside the global function : > word <- "hello" > (word.split <-

I have a question regarding best practices around module and plugin testing for rails applications. In our application we have created several plugins that extend ActiveRecord::Base with class methods, that when invoked in a model add behavior to that model. For example ... class SomeModel < ActiveRecord::Base adds_some_cool_behavior adds_another_wicked_sweet_behavior end My

G'day, I'm using a cvs version from a few days ago, and I've just installed The Sims and its Livin' Large and House Party extensions with minimal fuss (the icons were missing in the first setup/autorun screens). Trying to run the program, it displays a dialog with the title "A debugger has been detected" and the text "Unload the debugger and try again". So,

Michael Crawford wrote: > Unlike MP3, one > cannot even distribute the binary of an Open Source player. Even distributing an MP3 software player requires the payment of license fees: http://www.mp3licensing.com/royalty/software.html Erik -- ----------------------------------------------------------------- Erik de Castro Lopo

Hi, I am running cwrsync. 2004/05/11 [93] rsync error: some files could not be transferred (code 23) at /home/lapo/packaging/tmp/rsync-2.5.7/main.c(383) I am uncertain as to what this path statement is about in the above error message. /home/lapo/packaging/tmp/rsync-2.5.7/main.c(383) Thanks, Pat -- Patricia Palumbo DuBois & King, Inc. ppalumbo@dubois-king.com 802-728-4113 | ext 322

I am having trouble doing the following. I have a data.frame like this, where x and y are a variable that I want to do calculations on: Name Year x y ab 2001 15 3 ab 2001 10 2 ab 2002 12 8 ab 2003 7 10 dv 2002 10 15 dv 2002 3 2 dv 2003 1 15 Before I do all the other things I need to do with this data, I need to summarize or collapse the data by name and year. I've

Dear Christian, thanks for writing. I am no longer active in driver development, so I am forwarding your question to the NUT user list. The people on the list are very helpful. Best wishes, -- Peter Christian Dubois wrote: > > Hi there, I found this document on the internet and it was very useful > for me (http://www.mscs.dal.ca/~selinger/ups/backups.html), thank you. > > I

Folks, I'm trying to configure my dovecot installation to require client certificates for external/Internet connections, while still allowing my local network to not need certificates. This configuration is for Dovecot 2 (2.0.8 in Fedora 14), and I've tried to use the "remote" block to give different definitions for my local network vs the defaults. While most options seem to

Folks, I have a dataframe (snippet shown below). > demo.df[1:10, 1:6] dirn county year exp exp.wave r3 1 43901 Cuyahoga 2006 0 0 56 2 49098 Pickaway 2006 0 0 77 3 44164 Portage 2006 0 0 85 4 44610 Wayne 2006 1 1 76 5 45120 Wayne 2006 0 0 82 6 49593 Scioto 2006 1 1 89 7 46516 Crawford 2006 0 0

Hello everyone I was wondering how would one simulate from a Normal Wishart Distribution in R. A normal inverted Wishart distribution is denoted by NIW (M,C,d,S), where X/(Sigma) ~ N( M,C,(Sigma) ) -> a matrix normal distribution, (Sigma) -> column dispersion matrix (Sigma) ~ IW (d,S) -> inverted Wishart distribution Thanks a lot ! Best Shantanu [[alternative HTML version