Sorting Struct elements in Numerical order
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Md Farhad Mokter
el 6 de Jun. de 2019
Comentada: Stephen23
el 4 de Mayo de 2021
I have a program which takes some pictures in a struct and performs some pixel counting in each of the pictures. After running the program when I see the struct, the elements are not arranged in the way I want them to be. Here is the code-
img_folder = ('C:\Users\mm\work\blackpixelcount');
filenames = dir(fullfile(img_folder,'*.JPG'));
Total_image = numel(filenames);
for i= 1:Total_image
f = fullfile(img_folder,filenames(i).name);
im= imread(f);
bw= imbinarize(im);
out=nnz(~bw);
get(i)=out;
end
after running the code I see the struct and its sorted as given below-
![x.JPG](https://www.mathworks.com/matlabcentral/answers/uploaded_files/223258/x.jpeg)
Now I want the elements to be sorted in numerical ascending order (1,2,3.....9,10,11,12..).
I might be makigs some mistakes there, since I am biggener in matlab. Help will be really appreciated.
1 comentario
Respuesta aceptada
KSSV
el 6 de Jun. de 2019
Use this function from file exchange: https://in.mathworks.com/matlabcentral/fileexchange/47434-natural-order-filename-sort
9 comentarios
Stephen23
el 6 de Jun. de 2019
Editada: Stephen23
el 6 de Jun. de 2019
"But the 'filenames' variable remained same as before"
Sure. You only define it once (on the second line of your code), nowhere else in your code do you make any changes to filenames. You assigned the output of natsortfiles to variable b, so b contains the sorted filenames.
Follow the examples in the natsortfiles documentation.
Jan
el 6 de Jun. de 2019
Editada: Jan
el 6 de Jun. de 2019
@Md Farhad Mokter: Use this:
img_folder = ('C:\Users\mm\work\blackpixelcount');
filelist = dir(fullfile(img_folder,'*.JPG'));
filenames = {filelist.name}; % added
b = natsortfiles(filenames);
Total_image = numel(b);
getList = zeros(1, Total_image); % Pre-allocate, avoid "get" as name
for i = 1:Total_image
f = fullfile(img_folder, b{i}); % not b(i).name
im = imread(f);
bw = imbinarize(im);
getList(i) = nnz(~bw);
end
get is an important Matlab command, so avoid using it as name of a variable.
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