How to read multiple image directory with for loop

I'm trying to display image with for loop. My code is like that. After the 9 picture the image file name is image_0010. So if i want to display this image now what i need to do? Thanks in advance.

imageArray = [];
 for i = 1:200
     str = int2str(i);
     str = strcat('\','image_000',str,'.png');
     str = strcat('C:\Users\Hasibur Rahman\Documents\MATLAB\ClassWork2_62018040032_哈西\LFPW\trainset', str);
     image = imread(str);
     imageArray = image;
     imageArray = imageArray + image;
     figure,imshow(imageArray);
     title('Original Image!');
     pause(1.5);
 end
 

Answer 1

[Sudhakar Shinde]

1 option could be:

if i>9
    str = strcat('\','image_00',str,'.png');
end

[Stephen23]

Or just learn how to write simpler and more efficient code (e.g. sprintf).

Answer 2

[Stephen23]

Rather than fragile string concatenation and ungainly constructs involving int2str or num2str, the neat and efficient MATLAB approach is to use sprintf and fullfile:

D = 'C:\Users\Hasibur Rahman\Documents\MATLAB\ClassWork2_62018040032_哈西\LFPW\trainset';
for k = 1:200
    F = sprintf('image_%04d.png',k);
    I = imread(fullfile(D,F));
    imshow(I);
    pause(1.5)
end

This is what the MATLAB documentation recommends:

https://www.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html

Note that I also moved the directory definition to before the loop, where it belongs.

[Sudhakar Shinde]

sprintf looks good.