Converting Structure into 3d Matrix

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Afonso Espírito Santo 2021-11-24

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1594354-converting-structure-into-3d-matrix

评论： Afonso Espírito Santo 2021-11-27

采纳的回答： Matt J

在 MATLAB Online 中打开

Hi,

I am trying to post-process matrix of frames I get from a camera. Each frame is outputted as a.mat file with a "Frame" variable that is a 512x640 double. I want to import all of these files for each frame, I have 2497 frames so 2497 files, and create a 3D matrix that is 512x640x2497 with all the frames. I currently import the frames but it creates a 1x2497 strucutre with each field being a 512x640 double. Is it possible to convert this structure to a 3D matrix or import the data straight into a 3D matrix?

Thank you

This is my code so far:

for k = 0:2497
  filename = sprintf('Rec--000013_%d.mat', k);
  
  %Checking File Exists
  if isfile(filename)
		all_frames(k+1) = load(filename,'Frame');
	else
		fprintf('File %s does not exist.\n', filename);
	end
  
  fprintf('Now Reading File : Rec--000013_%d.mat\n', k)
   
end

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采纳的回答

Matt J 2021-11-24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1594354-converting-structure-into-3d-matrix#answer_838889

在 MATLAB Online 中打开

Matrix=cat(3, all_frames.Frame);

However, you will need generous RAM. Your all_frames structure already consumes about 5 GB in double flating point, and this will consume another 5 GB.

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Matt J 2021-11-26

Since you Accept-clicked the answer, I assume you figured it out?

Afonso Espírito Santo 2021-11-27

Hi Matt,

The original issue was solved.However, I have not figured out how to answer the question I asked in the comment. Should I open a new questions for that specifically?

Thanks!

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