diff --git a/nonlinear-filters/src/index_resample.m b/nonlinear-filters/src/index_resample.m
deleted file mode 100644
index da4d3377d..000000000
--- a/nonlinear-filters/src/index_resample.m
+++ /dev/null
@@ -1,72 +0,0 @@
-function resampling_index = index_resample(particles,weights,ParticleOptions)
-% Resamples particles.
-
-%@info:
-%! @deftypefn {Function File} {@var{indx} =} resample (@var{weights}, @var{method})
-%! @anchor{particle/resample}
-%! @sp 1
-%! Resamples particles.
-%! @sp 2
-%! @strong{Inputs}
-%! @sp 1
-%! @table @ @var
-%! @item weights
-%! n*1 vector of doubles, particles' weights.
-%! @item method
-%! string equal to 'residual' or 'traditional'.
-%! @end table
-%! @sp 2
-%! @strong{Outputs}
-%! @sp 1
-%! @table @ @var
-%! @item indx
-%! n*1 vector of intergers, indices.
-%! @end table
-%! @sp 2
-%! @strong{This function is called by:}
-%! @sp 1
-%! @ref{particle/sequantial_importance_particle_filter}
-%! @sp 2
-%! @strong{This function calls:}
-%! @sp 1
-%! @ref{residual_resampling}, @ref{traditional_resampling}
-%! @sp 2
-%! @end deftypefn
-%@eod:
-
-% Copyright (C) 2013 Dynare Team
-%
-% This file is part of Dynare.
-%
-% Dynare is free software: you can redistribute it and/or modify
-% it under the terms of the GNU General Public License as published by
-% the Free Software Foundation, either version 3 of the License, or
-% (at your option) any later version.
-%
-% Dynare is distributed in the hope that it will be useful,
-% but WITHOUT ANY WARRANTY; without even the implied warranty of
-% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-% GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License
-% along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
-
-defaultmethod = 1; % For residual based method set this variable equal to 0.
-
-if defaultmethod
-    if ParticleOptions.resampling.method.kitagawa
-        resampling_index = traditional_resampling(particles,weights,rand);
-    elseif ParticleOptions.resampling.method.stratified
-        resampling_index = traditional_resampling(particles,weights,rand(size(weights)));
-    else
-        error('Unknow sampling method!')
-    end
-else
-    if ParticleOptions.resampling.method.kitagawa
-        resampled_particles = residual_resampling(particles,weights,rand);
-    elseif ParticleOptions.resampling.method.stratified
-        resampled_particles = residual_resampling(particles,weights,rand(size(weights)));
-    else
-        error('Unknown sampling method!')
-    end
-end
\ No newline at end of file