How do I save my data from each loop iteration into a single matrix?
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I am trying to save each calculated variables from each run of the loop into an output file.
I have the following code, however it overwrites the data for each loop so I am only left with the final iteration's data in the end.
for i=[1:no_lines]
x= -image_width/2 + (i-1)*d_x;
xdc_center_focus (emit_aperture, [x 0 0]);
xdc_focus (emit_aperture, 0, [x 0 z_focus]);
xdc_center_focus (receive_aperture, [x 0 0]);
xdc_focus (receive_aperture, focus_times, [x*ones(Nf,1), zeros(Nf,1), focal_zones]);
N_pre = round(x/(width+kerf) + N_elements/2 - N_active/2);
N_post = N_elements - N_pre - N_active;
apo_vector=[zeros(1,N_pre) apo zeros(1,N_post)];
xdc_apodization (emit_aperture, 0, apo_vector);
xdc_apodization (receive_aperture, 0, apo_vector);
[rf_data, tstart]=calc_scat(emit_aperture, receive_aperture, phantom_positions, phantom_amplitudes); %output to save
save(sprintf('rft%04d.mat',k),'rf_data','tstart')
x = x + d_x; %adds to the x for the next iteration
end
回答（2 个）
Shubham Gupta
2018-12-10
编辑：Shubham Gupta
2018-12-10
save(sprintf('rft%04d.mat',k),'rf_data','tstart')
There should be " i " in place "k" in the above line and you will be able to save 'rf_data' and 't_start' as rtf0001, rtf0002 and so on. I hope this answers your question
Star Strider
2018-12-10
Without knowing what size your variables ‘rf_data’ and ‘tstart’ are, the easiest way would be to save them to cell arrays, then (if necessary) convert the cell arrays to numeric arrays after the loop, and save them then:
[rf_data{i}, tstart{i}]=calc_scat(emit_aperture, ...
. . .
end
save(sprintf('rft%04d.mat',i),'rf_data','tstart')
This will create the file name using the last value of ‘i’. Change (or delete) the sprintf call if you want to save it with one specific file name.
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2018-12-9
2018-12-10
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