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  1. Download OpenBUGS and upload it to dscratch. First upload it to AFS and then copy it to dscratch.
  2. Unzip the file on the cluster
  3. Create a file called linbugs with the following content and change permission using chmod 755 lingbugs
    export LD_ASSUME_KERNEL=2.4.1
    DIR=$(dirname $0)
    cd "$DIR"
    if [ \! -e "$DIR/temp" ] ; then
            mkdir "$DIR/temp"
    if [ -e ] ; then
            ./cbugs "$DIR" "$DIR/temp" "/"
            ./cbugs "$DIR" "$DIR/temp" "/"
  4. Create a file called Cbugs and compile it using
      gcc -o cbugs CBugs.c -ldl -m32 

    . The file includes the following codes

    /*              GNU General Public Licence
            This small C program loads the ELF shared library. 
            Save it as a .c file and then
            compile it on Linux using gcc -o cbugs Cbugs.c -ldl
    #include <dlfcn.h>
    #include <stdio.h>
    #include <string.h>
    int main (int argc, char **argv)
            void * handle;
            handle = dlopen("./", RTLD_LAZY);
            if (handle)
            return 0;

An example

  1. Start OpenBUGS by

    in the OpenBUGS directory

  2. If OpenBUGS successfully run, you will see
    OpenBUGS ClassicBUGS release 2.1.1
    type 'modelQuit()' to quit
  3. Then type in the following commands (those after >)
     Bugs> modelCheck("Examples/Airmodel.txt")
    model is syntactically correct
    Bugs> modelData("Examples/Airdata.txt")
    data loaded
    Bugs> modelCompile()
    model compiled
    Bugs> modelInits("Examples/Airinits.txt")
    model is initialized
    Bugs> modelUpdate(100000)
    100000 updates took 4 s
    Bugs> samplesSet("theta")
    monitor set
    Bugs> summarySet("theta")
    monitor set
    Bugs> modelUpdate(10000)
    10000 updates took 0 s
    Bugs> samplesStats("theta")
                             mean      sd        MC_error  val2.5pc  median    val97.5pc start     sample
    theta[1]                 -1.1      1.332     0.1092    -5.243    -0.7288   0.2504    101001    10000
    theta[2]                 0.05332   0.05231   0.004327  0.002579  0.03949   0.2046    101001    10000
    Bugs> samplesCoda("*","output")
    CODA files written
    Bugs> modelQuit()

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