+ third example


git-svn-id: https://svn.r-project.org/R/trunk@66628 00db46b3-68df-0310-9c12-caf00c1e9a41
fix merge(), new nobs() for dendrograms

git-svn-id: https://svn.r-project.org/R/trunk@66629 00db46b3-68df-0310-9c12-caf00c1e9a41
fix merge(), new nobs() for dendrograms

git-svn-id: https://svn.r-project.org/R/trunk@66630 00db46b3-68df-0310-9c12-caf00c1e9a41
fix 2 typos


git-svn-id: https://svn.r-project.org/R/trunk@66631 00db46b3-68df-0310-9c12-caf00c1e9a41