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

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 :/

[Joseph Cheng]

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

Answer 1

[Jason Nicholson]

This assumes the bitmaps are all the same size:

myArray = [img{:}];

[Fatih Nurcin]

yes, they are, but in the loop i get number like 49 50 60 but in for loop last number overwrites the former one, so i want to put them in array

[Jason Nicholson]

If this answers your question, please mark this as the correct answer. It helps my reputation points on MATLAB answers.

[Fatih Nurcin]

it doesn't help , because as a output i have number not image, i need to put numbers in an array

[Jason Nicholson]

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

[Jason Nicholson]

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

Answer 2

[Shravankumar P]

I guess you may go for index mapping. I just give you Idea try this once

for m=1:4

for n=1:4

X(m,n)=x(4*(m-1)+n);

end

end

x is the input which of your interest to put into an array X

Answer 3

[ubaid haroon]

what would you do if during the loop, those arrays are different lengths?