http://www.k-wave.org/forum/topic/b05-known-issues Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 21:36:42 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/b05-known-issues#post-332 Tue, 28 Feb 2012 03:41:18 +0000 Bradley Treeby 332@http://www.k-wave.org/forum/ <p>This list will be periodically updated by the developers (between major releases) as bugs and issues are found.</p> <p>-----------------------</p> <p><strong>Report Date:</strong> 13th March 2012</p> <p><strong>Issue:</strong><br /> Using the optional input <code>&#39;PlotLayout&#39;</code> set to <code>true</code> with <code>kspaceFirstOrder2D</code> when <code>medium.sound_speed</code> or <code>medium.density</code> are scalar values (homogeneous) generates a plot scale error.</p> <p><strong>Solution:</strong><br /> In <code>private/kspaceFirstOrder_plotLayout.m</code>, remove the plot scale used on lines 139 and 151.</p> <p>-----------------------</p> <p><strong>Report Date:</strong> 3rd April 2012</p> <p><strong>Issue:</strong><br /> The wavenumber variables <code>kgrid.kx</code>, <code>kgrid.k</code> (etc) are created incorrectly when the grid dimensions <code>Nx</code>, <code>Ny</code> (etc) have an odd number of grid points. This results in a small error (&lt; 1%) when the spectral derivatives are calculated.</p> <p><strong>Solution:</strong><br /> In <code>kWaveGrid.m</code>, the expression for <code>nx</code> on line 295 should be replaced with:</p> <p><code>nx = ((-(Nx-1)/2:(Nx-1)/2)/Nx).&#39;;</code></p> <p>The same expression should be used to replace line 179 in <code>private/makeGridStruct.m</code> (used for older versions of MATLAB).</p> <p>-----------------------</p> <p><strong>Report Date:</strong> 10th April 2012</p> <p><strong>Issue:</strong><br /> The variables <code>p_k</code> and <code>source.p0</code> are missing from the list of data cast variables.</p> <p><strong>Solution:</strong><br /> In <code>private/kspaceFirstOrder_dataCast.m</code>, on line 29 replace the list of cast variables with</p> <p><code>cast_variables = {&#39;kappa&#39;, &#39;p&#39;, &#39;p_k&#39;, &#39;c&#39;, &#39;dt&#39;, &#39;rho0&#39;};</code></p> <p>After line 90, add the lines:</p> <pre><code>% additional variables only used if there is an initial pressure source if isfield(source, &#39;p0&#39;) cast_variables = [cast_variables, {&#39;source.p0&#39;}]; end</code></pre> <p>----------------------- </p>