??? Error using ==> times
Operations between Matlab arrays and GPU arrays are not supported. (ERROR code 5)
Error in ==> kspaceFirstOrder3D at 741
ux_sgx = bsxfun(@times, pml_x_sgx, ...
I checked that times.m is in @GPUType directory, what can I do? Thanks
Hi Brad.
Thanks for your help.
I did download bsxfun shipped with GPUmat and put it in @GPUtype directory. It seems that k-wave used the bsxfun provided by GPUmat, however it tried to use the times funtion from Matlab instead of the corresponding times located in the same directory of bsxfun (@GPUtype). Why there is a symbol @ before the name of directory @GPUtype? What can I do?
Hao
Hi Hao,
Do you mean you downloaded the bsxfun from the k-Wave forum? Also, you will need to fix a data cast bug listed in the B.05 known issues on the 10th of April.
The @ symbol in the @GPUtype folder name tells MATLAB to only use the functions within the folder when the inputs are of GPUtype. This is correct.
Brad
Brad, thanks for your reply. I followed your guideline, it worked further step. The problem changed to:
Error using ==> reshape
Dimension cannot be zero.
Error in ==> kspaceFirstOrder3D at 940
sensor_data(:, file_index - sensor_data_buffer_size + 1) = ...
Error in ==> example_us_bmode_linear_transducer at 239
sensor_data = kspaceFirstOrder3D(kgrid, medium, transducer, transducer, input_args{:});
***** It seems that sensor_data is a GPUtype, however reshape need a CPU type, so the dimension is zero.
Hi Hao,
Thanks for your follow-up. Do you also get an error when you use GPUmat with other k-Wave examples, or is just when you use a kWaveTransducer object as a sensor (i.e., the final two US examples)?
Brad.
Hi Brad. The same problem with example_us_transducer_as_sensor.m
??? Error using ==> reshape
Dimension cannot be zero.
Error in ==> kspaceFirstOrder3D at 940
sensor_data(:, file_index - sensor_data_buffer_size + 1) = ...
Error in ==> example_us_transducer_as_sensor at 137
[sensor_data] = kspaceFirstOrder3D(kgrid, medium, source, transducer, input_args{:});
Hao
What about for the "Defining an Ultrasound Transducer" and "Simulating Ultrasound Beam Patterns" examples?
the same problems
Hi Hao,
As you say, the problem is with reshape. The GPUmat implementation doesn't allow the use of [] to allow the dimensions to be calculated automatically. This error should only occur when using an object of the kWaveTransducer class as a sensor with GPUmat.
In this case, you can replace the line where you are receiving an error with:
sensor_data(:, file_index - sensor_data_buffer_size + 1) = sum(reshape(sum(reshape(current_vals, sensor.number_active_elements*sensor.element_width, sensor.element_length), 2), sensor.element_width, sensor.number_active_elements).', 2);
And similarly for the case without elevation focusing:
sensor_data(:, file_index) = sum(reshape(sum(reshape(p(sensor_mask_ind), sensor.number_active_elements*sensor.element_width, sensor.element_length), 2), sensor.element_width, sensor.number_active_elements).', 2);
Let me know if you still receive errors after this.
Brad.
Hi Brad,
It works. Thanks a lot.
Hao
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