How can i put my output numbers in for loop to an array

Question

Fatih Nurcin 2014-6-17

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/134920-how-can-i-put-my-output-numbers-in-for-loop-to-an-array

回答： ubaid haroon 2017-3-1

z=('/Users/fatihnurcin/Desktop/Dandnd/dilated')
cd(z)
list = dir('*.bmp');
for i = 1:length(list)
img{i} = imread(list(i).name);
end
for i = 1:length(list)
    a=img{i};
b=im2bw(a,0.20);
figure
subplot(1,3,1);
imshow(b)
c=b(120,100:250);
subplot(1,3,3);
plot(c);
for n=1:length(c);
    d= padarray(c,[0 1],'replicate','post');
    e(n)=d(n)-d(n+1);
    left=find(e==1);
    right=find(e==-1); 
    f=right-left;
end
f
end

This is my whole code, it takes a row from a binary photo and tries to find where its black and where its not and calculate the black area so i want to ask how can i put my outputs(outputs are numbers calculated due to black arena) in an array, i couldn't do it by adding (n) to left and right,

left(n)=find(e(n)==1);
    right(n)=find(e(n)==-1); 
    f(n)=right(n)-left(n);

I need an urgent help , i need to deliver my project in 2 days :/

1 个评论
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Joseph Cheng 2014-6-17

在 MATLAB Online 中打开

reformatted to be readable.

z=('/Users/fatihnurcin/Desktop/Dandnd/dilated')
cd(z) 
list = dir('*.bmp');
for i = 1:length(list)
     img{i} = imread(list(i).name); 
end 
for i = 1:length(list) 
     a=img{i}; 
     b=im2bw(a,0.20); 
     figure subplot(1,3,1); 
     imshow(b) 
     c=b(120,100:250); 
     subplot(1,3,3); 
     plot(c);
for n=1:length(c); 
   d= padarray(c,[0 1],'replicate','post'); 
   e(n)=d(n)-d(n+1); 
   left=find(e==1); 
   right=find(e==-1); 
   f=right-left; 
end 
f
end

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Answer 1

Jason Nicholson 2014-6-17

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/134920-how-can-i-put-my-output-numbers-in-for-loop-to-an-array#answer_141434

在 MATLAB Online 中打开

This assumes the bitmaps are all the same size:

myArray = [img{:}];

5 个评论
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Jason Nicholson 2014-6-18

Can you give me some data so I can work out the issue?

Jason Nicholson 2014-6-18

在 MATLAB Online 中打开

Honestly, it is clear to me you don't really know what you are doing with MATLAB. After this project is done, you need to read up "getting started" documents for MATLAB. The code below is ugly but works. I believe it is what you want as well.

list = dir('*.bmp');
% preallocate cell array
img = cell(length(list),1);
f = cell(length(list), 250-100);
for i = 1:length(list)
   img{i} = imread(list(i).name); 
end 
for i = 1:length(list) 
   a=img{i}; 
   b=im2bw(a,0.20); 
   figure;
   subplot(1,3,1); 
   imshow(b) 
   c=b(120,100:250); 
   subplot(1,3,3); 
   plot(c);
for n=1:length(c); 
 d= padarray(c,[0 1],'replicate','post'); 
 e(n)=d(n)-d(n+1); 
 left=find(e==1); 
 right=find(e==-1); 
 f{i, n} = right-left; 
end 
end