cleaning up to run R code in the paper

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventhistory@189 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
correction in the paper

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventhistory@190 edb9625f-4e0d-4859-8d74-9fd3b1da38cb