http://www.k-wave.org/forum/topic/arbitrary-analysis-time-period Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 23:39:14 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/arbitrary-analysis-time-period#post-633 Tue, 24 Jul 2012 02:21:16 +0000 Bradley Treeby 633@http://www.k-wave.org/forum/ <p>Hi Ian,</p> <p>There are a couple of possibilities. First, you can set <code>kgrid.t_array</code> manually after calling <code>makeGrid</code> but before running the simulation. For example:</p> <pre><code>dt = 1e-9; t_end = 1e-6; kgrid.t_array = 0:dt:t_end;</code></pre> <p>Second, you can call the function <a href="http://www.k-wave.org/documentation/makeTime.php">makeTime</a> to create the time array for you. This has parameter inputs to set the CFL number and the end time. For example:</p> <p><code>kgrid.t_array = makeTime(kgrid, medium.sound_speed, cfl, t_end)</code></p> <p>The other parameters, <code>kgrid.Nt</code> and <code>kgrid.dt</code> are automatically derived from <code>kgrid.t_array</code> (they shouldn't be modified directly).</p> <p>Good luck with your simulations,</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/arbitrary-analysis-time-period#post-631 Sun, 22 Jul 2012 10:14:09 +0000 ian_whitehouse 631@http://www.k-wave.org/forum/ <p>How do I get a kspaceFirstOrder2D analysis to operate over an arbitrarily long time period. I see that kgrid has two properties t_array, Nt and dt but how do I set these properties so that the analysis proceeds over a longer time period than provided by default?</p> <p>Thanks for your help and a great/interesting toolbox! </p>