if exampleRand is sparse, then return create a transition matrix that is about 1/3 dense
if exampleRand is sparse, then return create a transition matrix that is about 1/3 dense

McCabeJM/pymdptoolbox,yasserglez/pymdptoolbox,silgon/pymdptoolbox,sawcordwell/pymdptoolbox,silgon/pymdptoolbox,yasserglez/pymdptoolbox,McCabeJM/pymdptoolbox,sawcordwell/pymdptoolbox