How to save each data from for loop

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neha gautam 2018-4-30

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https://ww2.mathworks.cn/matlabcentral/answers/398246-how-to-save-each-data-from-for-loop

评论： dpb 2018-5-1

采纳的回答： dpb

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I have a for loop(last for loop), but every character overwrites and I have only the final data left.

[L Ne]=bwlabel(imagen);
%%Measure properties of image regions
propied=regionprops(L,'BoundingBox');
hold on
%%Plot Bounding Box
for n=1:size(propied,1)
  rectangle('Position',propied(n).BoundingBox,'EdgeColor','g','LineWidth',2)
end
hold off
pause (1)
%%Objects extraction
figure(3)
for n=1:Ne
  [r,c] = find(L==n);
  n1=imagen(min(r):max(r),min(c):max(c));
  %imshow(~n1);
  pause(0.5)
end

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Ameer Hamza 2018-4-30

What is imagen()? Is it your own function. In any case refer to my answer below.

neha gautam 2018-4-30

imagen() is a variable which store the matrix of image.

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采纳的回答

dpb 2018-4-30

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https://ww2.mathworks.cn/matlabcentral/answers/398246-how-to-save-each-data-from-for-loop#answer_317955

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Easiest solution is to save each in cell array since the subsets can all be differing sizes can't just store as planes in 3D array...

IMAGES=cell(Ne,1);          % create a cell array of proper size
for n=1:Ne
  [r,c] = find(L==n);
  IMAGES(i)={imagen(min(r):max(r),min(c):max(c))};  % store each 2D array in nth cell
  %imshow(IMAGES{n});
  pause(0.5)
end

更多回答（1 个）

Ameer Hamza 2018-4-30

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/398246-how-to-save-each-data-from-for-loop#answer_317952

编辑：Ameer Hamza 2018-4-30

在 MATLAB Online 中打开

Change your last for loop as follow

n1 = []
for n=1:Ne
  [r,c] = find(L==n);
  n1 = [n1 imagen(min(r):max(r),min(c):max(c))];
  %imshow(~n1);
  pause(0.5)
end

n1 will save all the values.

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neha gautam 2018-5-1

Thank you so much for your valuable advice. I would like to go with your suggestions.

dpb 2018-5-1

You have my permission to do so, yes... :)

Good plan to follow "best practices" in avoiding these kinds of what_seem_so_easy_to_do techniques, but the short-term gratification leads to longer-term misery when get to anything but the most trivial of applictions--best to learn to avoid altogether while learning; then with time one can recognize when it is time to break the rule for a specific purpose (altho that's not that common, it does occur).

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