Blog Archives

General steps to compile JAGS in a Linux based OS system and install rjags in R

June 6, 2010
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I have an entry here about how to install JAGS and rjags in Fedora.  However, I have exchanged emails with Robert Dorazio and Dr. Martyn Plummer.  Here are the easier steps to compile JAGS and install rjags in R. 1. After you extract the source code...

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JAGS, rjags, and coda packages for Fedora

June 6, 2010
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Christopher has the RPMs (for Fedora users) for JAGS, coda, and rjags on his blog. The specific blog entry is here: http://cddesjardins.wordpress.com/2010/06/04/jags-package-for-fedora-13-64-bit/ If you have trouble installing JAGS or rjags in Fedora,...

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An OpenSSH software for Windows 7 / Vista

November 30, 2009
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Here is an OpenSSH software I personally found useful and working well under Windows 7 / Vista.  It is copSSH. Besides it is free and open source, it is still actively maintained.  It works well with the UAC (user account control setting) of Windows...

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My mi presentation at the useR! 2009

August 4, 2009
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I have been to many conferences. Most of them are of Political Science. The common feature of these conferences is that the audience size is always small. If you get 10 audiences in your panel, your must be a big name.My presentation at the useR! 20...

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useR! 2009 conference, Rennes, France

August 2, 2009
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Since my last attendance of the useR conference in Vienna, Austria, I have always wanted to go back. However, the high registration fee was always the factor that chills me off.This year, I am taking advantage of my last year as the student (the regis...

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Delete a List Component in R

June 24, 2009
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In R, the way to delete a component in a list object is different from matrix and vector objects. For a vector, to delete an element:vec <- c(1, 2, 3)vec <- vecFor a matrix, to delete a row or a column:mat <- matrix(c(1,2,3,4), 2, 2)mat2 <- mat # delete a rowmat3 <- mat # delete a columnFor a list,...

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Simulate parameters of a tobit model

March 3, 2009
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I got an email, asking me if our arm package can simulate tobit model to get simulated parameters. Indeed, arm does not suport tobit model. It only support sim() for lm, glm and mer classes in R. But it is not difficult to get a tobit verison of sim(). Here are the steps:1. fit a tobit...

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Our new R package: R2jags

February 8, 2009
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I have got emails occasionally from JAGS users, asking about our new R package: R2jags. Basically, R2jags runs JAGS via R and makes postanalysis easier to be done in R. Taking advantage of the functions...

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Importing Generic Function from Other Package: A Tip on Writing a R Package

January 30, 2009
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I did not know this and had to spend the whole week to figure out what's wrong with my code. I was updating the mi package. While I was doing code checking procedure, I always got a error message that I did not know what was going on. I remember last...

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Runing R in the Command Mode in the Window system

January 29, 2009
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Just when I am about to convert myself into a Linux user, I found this. Running R in the command mode in the Window system is much faster. Here is a simple test:in the Window interface:> system.time(rnorm(1000000)%*%rnorm(1000000)) user system elapsed 1.06 0.05 1.14 in the...

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