The RooStats code is developing quickly. If you need something more recent than the latest ROOT release, you should checkout and build the development branch of RooStats.

First, to check out the trunk of root, do:

svn co https://root.cern.ch/svn/root/trunk root

Then, if you have checked out the trunk already, and have setup $ROOTSYS to point to it, do:

cd $ROOTSYS/roofit
svn switch https://root.cern.ch/svn/root/branches/dev/roostats/roofit
cd $ROOTSYS
make

Now you will have the trunk of ROOT with only roofit/ pointing to your dev branch. This assumes that your original ROOT release had roofit enabled.

It is possible that the most recent RooFit and RooStats changes also need something in the rest of the ROOT release. In that case, you may need to check out the entire ROOT release.

To check out the entire ROOT release from the ROOT SVN repository, go to some temporary directory and type:

 svn co https://root.cern.ch/svn/root/branches/dev/roostats root

then build and install ROOT via (you may want different configure options)

configure --enable-roofit
make
make install 

or do some more custom stuff based on info here:

• http://root.cern.ch/drupal/content/subversion-howto#I_have_checked_out_starting_at_t
• http://root.cern.ch/drupal/content/installing-root-source

-- KyleCranmer - 07 May 2009