  The high energy neutrinos produced in a choked GRB can undergo matter
oscillation before emerging out of the stellar envelope. Before reaching the
detector on Earth, these neutrinos can undergo further vacuum oscillation and
then Earth matter oscillation. In the context of IceCube we study the Earth
matter effect on neutrino flux in the detector. For the calculation of
track-to-shower ratio R in the IceCube, we have included the shadowing effect
and the additional contribution from the muon track produced by the high energy
tau lepton decay in the vicinity of the detector. We observed that R is
different for different CP phases in vacuum but the matter effect suppresses
these differences. We have also studied the behavior of R when the spectral
index $\alpha$ varies.
