http://www.k-wave.org/forum/topic/smoothing-signal-1 Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 04:35:05 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/smoothing-signal-1#post-4540 Thu, 22 May 2014 16:03:03 +0000 Bradley Treeby 4540@http://www.k-wave.org/forum/ <p>Hi Mehran,</p> <p>To use <code>smooth</code>, you should use the following syntax:</p> <pre><code>x = rand(100, 1); y = smooth(makeGrid(100, 1), x); plot(x, &#39;k-&#39;); hold on; plot(y, &#39;b-&#39;);</code></pre> <p>The filter (a Blackman window by default) is normalised in frequency space, so it doesn't depend on what grid spacing you use for <code>makeGrid</code>. You could do same thing more directly by defining your own window. For example:</p> <pre><code>x = rand(100, 1); win = getWin(100, &#39;Blackman&#39;); y = real(ifft(ifftshift(win).*fft(x))); plot(x, &#39;k-&#39;); hold on; plot(y, &#39;b-&#39;);</code></pre> <p>Hope that helps,</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/smoothing-signal-1#post-4529 Wed, 21 May 2014 18:21:41 +0000 mehran-kiani 4529@http://www.k-wave.org/forum/ <p>Hi,<br /> At first, I congratulate for your perfect toolbox that is sufficiently to help me &amp; other.<br /> I want to smooth my 3251*1 signal with Fastsmooth function, but I not familiar with makegrid and get the below error after run the command : </p> <p>??? Error using ==&gt; times<br /> Matrix dimensions must agree.</p> <p>Error in ==&gt; smooth at 83<br /> mat_sm = real(ifftn(fftn(mat).*ifftshift(win)));</p> <p>My signal delta or sample rate is 0.02 s.</p> <p>Pls, help me for define proper kgrid to smooth my signal.</p> <p>Best Regards<br /> Mehran </p>