//adjust tree to make sure root to tip length is .5
int root = t->findRoot();
t->tree[root].setBranchLength((0.5 - t->tree[root].getLengthToLeaves()));
//adjust tree to make sure root to tip length is .5
int root = t->findRoot();
t->tree[root].setBranchLength((0.5 - t->tree[root].getLengthToLeaves()));