save images inside a for loop at uneven intervals

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Turbulence Analysis
编辑： Matt J 2024-1-25
Hi,
I am trying to save images inside the Img array that is generated inside the for loop at uneven iteration numbers. For example sometimes image generated at 10th iteration, while sometimes it's at 150th iteration. How to handle this?
for i = 1:a
B = some process % my image
Img(:,:,) = B
end

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采纳的回答

Voss
Voss 2024-1-25
Here's one way that may work for your particular task:
Img = zeros(0,0,0);
for i = 1:a
B = some process % my image
if ... % if some condition says to store this B in Img
Img(:,:,end+1) = B;
end
end
  6 个评论
显示 4更早的评论
Voss
Voss 2024-1-25
Maybe something along these lines:
Img = zeros(0,0,0);
last_stored_time = ts(1);
for i = 1:a
B = some process % my image
if ts(i) - last_stored_time >= 200
Img(:,:,end+1) = B;
last_stored_time = ts(i);
end
end

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更多回答（2 个）

Matt J
Matt J 2024-1-25
编辑：Matt J 2024-1-25
One way,
Img=nan(M,N,a);
Isubset=[10 47, 150,...,a]
for i = 1:a
B = some process % my image
if ismember(i,Isubset)
Img(:,:,i) = B;
end
end
  1 个评论
Turbulence Analysis
Turbulence Analysis 2024-1-25
移动：Voss 2024-1-25
Hi Matt,
Actually iteration number 10, 150 is just an example, in reality these numbers are highly random.

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Matt J
Matt J 2024-1-25
编辑：Matt J 2024-1-25
If you don't know in advance which and how many loop iterations you'll be storing, it would be best to accumulate them in a cell array, and then post-concatenate:
Img = cell(1,a);
for i = 1:a
B = some process % my image
if ... % if some condition says to store this B in Img
Img{i} = B;
end
end
Img=cat(3,Img{:}); %empty cells are discarded

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