Si instead of Sj

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/correg@353 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
update doc

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/correg@354 edb9625f-4e0d-4859-8d74-9fd3b1da38cb