#3D DIAG MATLAB MANUAL#
#3D DIAG MATLAB FREE#

Import 'system. Maximum of a matrix along dimension X=1,2Īssigning a vector to a matrix column sliceīoundary handling, clipping (coordinate transforms)

Minimum of a matrix along dimension X=1,2 Matrices passed by reference for efficiency More efficient is to create the resulting matrix using zeros(x), then use slice accessors to fill in the different parts. Quasar notes: please avoid because this programming approach is not very efficient. Missing values (IEEE-754 floating point status flags) ‘end’ variable, like in A(end,end) is currently not supported.Īll functions work transparently on the GPU (in MATLAB you need to use special datatypes ‘GPUsingle’, ‘GPUdouble’, …) Matrices are passed by reference rather than by value.

#3D DIAG MATLAB MANUAL#

Quick hints (see reference manual for a complete description):

#3D DIAG MATLAB FREE#

Please feel free to extend this page if you find something that is missing. Option to use a smooth ramp to avoid start-up transients.This section gives an overview of various functions and operators in Matlab and Quasar. Note, setting a value for the optional input 'Time' will override this value. Option to specify the multiplicative factor used to calculate t based on the time taken to propagate across the longest grid diagonal.

Option to specify the time t at which the wavefield is calculated to extract the amplitude and phase. The saved variables can be used to run simulations using the C++ code. If set, after the precomputation phase, the input variables used in the time loop are saved the specified location in HDF5 format. String containing a filename (including pathname if required). Note, setting a value for the optional input 'ExpandedGridSize' will override this value. Option to set the search range used to find the expanded grid size with the smallest prime factors. Option to specify the multiplicative factor used to calculate the minimum expanded grid size to avoid wave wrapping based on time t. Option to specify the size of the grid after expansion used to avoid wave wrapping. (one, two, or three element vector) or 'auto' Optional 'string', value pairs that may be used to modify the default computational settings. Matrix of the source phase at each grid point Matrix of the source amplitude at each grid point The Journal of the Acoustical Society of America, 143(1), 529-537. Rapid calculation of acoustic fields from arbitrary continuous-wave sources. = acousticFieldPropagator(amp_in, phase_in, dx, f0, c0) % define grid propertiesĭx = 1e-4 % % define input amplitude and phase for a line sourceĬ0 = 1500 % % compute pressure field To avoid wave wrapping, the domain size used for calculation is automatically expanded to a suitable dimension size with small prime factors.Ī simple example of computing the field from a line source in 2D is given below. This allows the acoustic pressure for all spatial positions at any time t > 0 to be calculated in a single step without numerical quadrature. The temporal convolution integral is solved analytically, and the remaining integrals are expressed in the form of the spatial Fourier transform. The solution is based on the Green's function for the homogeneous wave equation expressed in the spatial frequency domain or k-space as outlined in. This allows arrays of arbitrary geometry and numbers of elements to be defined. The phased array is defined in completely general form as a matrix of amplitude and phase. I merely want to extract the main daigonals of Ht for all t and store them in a new 3d matrix Dt which is also 14x14x1045 which contains the diagonal elements of every Ht and zeros in all other positions. I have a 14x14x1045 matrix Ht, t1.,1045 simbolizes the number of observations. )ĪcousticFieldPropagator calculates the steady state field pattern (complex pressure or amplitude and phase) from an arbitrary phased array (or other acoustic source) driven by a single frequency continuous wave sinusoid in a homogeneous and lossless medium. I thought the diag function should be able to do this task. = acousticFieldPropagator(amp_in, phase_in, dx, f0, c0. Pressure = acousticFieldPropagator(amp_in, phase_in, dx, f0, c0.

Pressure = acousticFieldPropagator(amp_in, phase_in, dx, f0, c0)

3d diag matlab