could you explain to me how i would be able to use the dir function, to do a loop through a directory and all of the subfolders in the directory for files that have the following format.

i have several subfolders in my directory. specifically ones that correspond to a date (ie. 20091011), and in each of those folders, there are several subfolders corresponding to a specific image set. In each of those folders are about 47 files, and I need to process the most recent/the last file in those folders

I00000XX (XX = is a series of numbers corresponding to the file name)…. there is no file extension. (its a DICOM file).

The subfolders are as follows:

ImageData (contains 1 folder) > MDX1 (contains one folder) > image (contains several folders, each corresponding to a date) > 20091002 (contains several folders, each corresponding to a image set) > E0000012 > all of the files, of which the last file is the file I need.

I want to create a list of sorts of all of these files (ie, path).

Then I want to run an executable on all of these files, to get an output that i can save in matrix form

thanks much!

I am trying for batch processing using some satellite data whose names are as follows for example

ID2r1-AMSRE-D.252004150A.v03.10V
ID2r1-AMSRE-D.252004150A.v03.89V
ID2r1-AMSRE-D.252004150D.v03.10V
ID2r1-AMSRE-D.252004150D.v03.89V
ID2r1-AMSRE-D.252004151A.v03.89V

etc.

these are the examples of files. I am unable to process them in batch. Although I could read them individually and then save them in mat format. But it takes time and I want to do batch processing and the necessary computations. May I ask your help?

s = dir('*.jpg');

You can combine the filenames into a single cell array using the comma-separated list syntax for structures:

names = {s.name};

I changed imwrite for saveas and it worked !!!

Thanks for showing us your code. It was very helpful.

Camilo

Your code is working almost perfectly, but, whenever I go to the folder where I am storing the images I cannot see them. The files are there, but the images are blank. I am using Windows Picture and Fax viewer to open them. I can’t figure out if there is something with the code or there is something wrong with the Windows Picture and Fax viewer. This is the code I am using:

close all
files = dir (’D:\Users\Camilo\Matlab Programs\*.bmp’);

for k = 1:numel(files)

A = imread(files(k).name);
% A = im2double(A);

A2 = imcrop(A,[30 25 1152 928]);
A3 = imcrop (A2,[539 165 1152 928]);

[ypix,xpix] = size (A3);

xdim = 1.98;
ydim =(ypix/xpix)*xdim;
xstart = -1;
ystart =(892-904)*(xdim/xpix);
x = 1.006;

A3 = imagesc([xstart x],[ydim ystart], A3);

grid on;
axis image;
axis xy;
xlabel(’Axial Distance, in’)
ylabel(’Vertical Distance, in’)
colormap(gray);

imwrite(A3, [’D:\Users\Camilo\Matlab Programs\Cropped\’files(k).name],’bmp’ )

end

Let me know what you think when you can. Thanks in advance.

Camilo

I am new to MATLAB, and am trying to process some matrices, using the batch commands, roughly as you have outlined above. I have a number of .MAT files that were generated by a different program and I am trying to export the matrices (480×640 double) to individual ascii files. I am able to export a single file using
>save(’NEW0470′,’-ASCII). But have been unsuccessful to run this in a batch command format. I am also trying to change the file extension to .txt, Below are 2 examples of the scripts I have been trying to run, it seems that the renaming process is working well, but every time I try to run it, I get a warning message telling me

“Warning: Attempt to write an unsupported data type to an ASCII file.
Variable ‘files’ not written to file.

Entire scrip:

files = dir('NEW*');
for k = 1:numel(files)
    input_name = files(k).name
    [path, name, extension] = fileparts(input_name)
    output_name = fullfile(path, [name '.txt'])
    save(files(k).name,'-ASCII')
end

Subset that I tried as well, just to run the export function:

files = dir('NEW*');
for k = 1:numel(files)
    save(files(k).name,'-ASCII')
end

Not sure if this makes any sens to you, but if you have a chance to take a look and let me know what you think, would be fantastic.

Best regards,
Ian