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diff --git a/samples/s016_plots.m b/samples/s016_plots.m
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+%------------------------------------------------------------------------
+% This file is part of the
+% All Scale Tomographic Reconstruction Antwerp Toolbox ("ASTRA-Toolbox")
+%
+% Copyright: iMinds-Vision Lab, University of Antwerp
+% License: Open Source under GPLv3
+% Contact: mailto:astra@ua.ac.be
+% Website: http://astra.ua.ac.be
+%------------------------------------------------------------------------
+
+vol_geom = astra_create_vol_geom(256, 256);
+proj_geom = astra_create_proj_geom('parallel', 1.0, 384, linspace2(0,pi,180));
+
+% As before, create a sinogram from a phantom
+P = phantom(256);
+[sinogram_id, sinogram] = astra_create_sino_gpu(P, proj_geom, vol_geom);
+figure(1); imshow(P, []);
+figure(2); imshow(sinogram, []);
+
+% Create a data object for the reconstruction
+rec_id = astra_mex_data2d('create', '-vol', vol_geom);
+
+% Set up the parameters for a reconstruction algorithm using the GPU
+cfg = astra_struct('SIRT_CUDA');
+cfg.ReconstructionDataId = rec_id;
+cfg.ProjectionDataId = sinogram_id;
+
+% Create the algorithm object from the configuration structure
+alg_id = astra_mex_algorithm('create', cfg);
+
+% Run 1500 iterations of the algorithm one at a time, keeping track of errors
+nIters = 1500;
+phantom_error = zeros(1, nIters);
+residual_error = zeros(1, nIters);
+for i = 1:nIters;
+  % Run a single iteration
+  astra_mex_algorithm('iterate', alg_id, 1);
+
+  residual_error(i) = astra_mex_algorithm('get_res_norm', alg_id);
+  rec = astra_mex_data2d('get', rec_id);
+  phantom_error(i) = sqrt(sumsqr(rec - P));
+end
+
+% Get the result
+rec = astra_mex_data2d('get', rec_id);
+figure(3); imshow(rec, []);
+
+figure(4); plot(residual_error)
+figure(5); plot(phantom_error)
+
+% Clean up.
+astra_mex_algorithm('delete', alg_id);
+astra_mex_data2d('delete', rec_id);
+astra_mex_data2d('delete', sinogram_id);