http://www.k-wave.org/forum/topic/on-the-problem-of-adding-the-elements-using-kwavearray Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 22:32:19 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/on-the-problem-of-adding-the-elements-using-kwavearray#post-9051 Mon, 18 Mar 2024 07:34:33 +0000 Bear_Leisure 9051@http://www.k-wave.org/forum/ <p>I see,Thank you,Professor Trebby. </p> http://www.k-wave.org/forum/topic/on-the-problem-of-adding-the-elements-using-kwavearray#post-8960 Fri, 24 Nov 2023 17:43:26 +0000 Bradley Treeby 8960@http://www.k-wave.org/forum/ <p>First, check if your source signal has two signals, one for each element. The size should be <code>[number_elements, Nt]</code>. Otherwise, can you post a complete example that reproduces the problem, and I'll take a look. </p> http://www.k-wave.org/forum/topic/on-the-problem-of-adding-the-elements-using-kwavearray#post-8913 Thu, 21 Sep 2023 10:47:47 +0000 Bear_Leisure 8913@http://www.k-wave.org/forum/ <p>Hello, professor Treeby. I tried to adding two concave sphere elements Using kWaveArray.addBowlElement. The specific implementation process is as follows:<br /> % --------------------<br /> % SOURCE<br /> % --------------------</p> <p>% create time varying source<br /> source_sig = createCWSignals(kgrid.t_array, source_f0, source_amp, 0);</p> <p>% set bowl 1 position and orientation<br /> bowl_pos = [kgrid.x_vec(1), 0, 0];<br /> focus_pos = [kgrid.x_vec(end), 0, 0];</p> <p>% create empty kWaveArray<br /> karray = kWaveArray('BLITolerance', bli_tolerance, 'UpsamplingRate', upsampling_rate, 'SinglePrecision', true);</p> <p>% add bowl 1 shaped element<br /> karray.addBowlElement(bowl_pos, source_roc, source_diameter, focus_pos);</p> <p>% set bowl 2 position and orientation<br /> bowl_pos = [kgrid.x_vec(end), 0, 0];<br /> focus_pos = [kgrid.x_vec(1), 0, 0];</p> <p>% add bowl 2 shaped element<br /> karray.addBowlElement(bowl_pos, source_roc, source_diameter, focus_pos);</p> <p>% assign binary mask<br /> source.p_mask = karray.getArrayBinaryMask(kgrid);</p> <p>% assign source signals<br /> source.p = karray.getDistributedSourceSignal(kgrid, source_sig);</p> <p> Although the addition was successful, an error occurred when using karray.getDistributedSourceSignal assign source signals. The error is following as:<br /> Example_CustomedPhaseArray<br /> Computing distributed source signal...<br /> calculating binary mask... completed in 52.835s<br /> approximate size of source matrix: 790 MB (single precision)<br /> calculating element 1 grid weights... completed in 21.28s<br /> calculating element 1 distributed source... completed in 0.691s<br /> calculating element 2 grid weights... completed in 46.656s<br /> calculating element 2 distributed source... The index at position 1 exceeds the array boundary. The index cannot exceed 1.</p> <p>Error kWaveArray/getDistributedSourceSignal (Line 1057)<br /> + bsxfun(@times, source_weights(element_mask_ind), source_signal(ind, :));</p> <p>Error Example_CustomedPhaseArray (Line 92)<br /> source.p = karray.getDistributedSourceSignal(kgrid, source_sig);<br /> I tried to find the causefrom kwavearray, but failed! Thus, I would like to consult with the professor!</p> <p> Thank you for the attention.<br /> Jiupeng Xiong </p>