Sorting Struct elements in Numerical order
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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-
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.
Accepted Answer
KSSV
on 6 Jun 2019
Use this function from file exchange: https://in.mathworks.com/matlabcentral/fileexchange/47434-natural-order-filename-sort
9 Comments
Stephen23
on 6 Jun 2019
Edited: Stephen23
on 6 Jun 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
on 6 Jun 2019
Edited: Jan
on 6 Jun 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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