Hi,
I defined a 3D sphere sensor. Total 4333 sensors are distributed in a 3D sphere. After I run the simulation, all sensors' data is stored in the 2D 'sensor_data' matrix (4333*N).
It seems each sensor has a row to store the pressure data. But how can I know each sensor's position? I have to do the reconstruction so I have to know where in the sphere does the data recorded from.
Thank you.
Hi Stang,
The sensor data is ordered using MATLAB's standard column wise linear matrix ordering. There is some more information and an example in Section 3.4 of the k-Wave manual. You can use find to get the linear index of the sensor positions, e.g.,
linear_ind = find(sensor.mask == 1);
and ind2sub to convert these the grid indices if needed, e.g.,
[x_ind, y_ind, z_ind] = ind2sub([Nx, Ny, Nz], linear_ind);
If you want to re-order the data, you could also look at the function reorderSensorData (which only works for 2D), and try to replicate this for 3D.
Hope that helps,
Brad.
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