Loading file from my directory?

Dear I would like to download imagej-nii and also ROI (from imageJ software) and calculate the mean and std of the voxels within adjacent 5 slices (3D volume) for 6 animals. I have created code but many errors I have,,,, cause I am so beginner to use matlab.

I do not know what is the ROI format, because it is appear as text. When I search on the ImageJ website, there is no specific format for the ROI.

% for multi animal calculation.

    Sabjects={'animal1', 'animal2', 'animal3','animal4', 'animal5,'animal6'}; 

    for i =1: size(subjects,2); 
    image = load - nii(['\MRI\..\'subjects(i)'\roi.nii']); 
    for j = 0:1 
    region = voxel (mod = = i); 
    deviation (j,i+1)= std (region,[],3); 
    end 
    end

      %%this is for one animal

    image = load-nii ("name of the file"); 
    roi = load-nii ("name of the file");
    view-nii (roi); view-nii (image);

    region1= voxels ((mod (roi ,2) == 1).* (roi > 0)); 
    region2= voxels ((mod (roi ,2) == 0).* (roi > 0)); 
    deviation = std (region ,[] ,3);

[Ben11]

Can you post what kind of text you get as the ROI? Is there any way you could do everything in Matlab, i.e. select the ROI in Matlab in the first place with imrect or rbbox for example?

[Dhafer]

I do not know what is the roi and how to read the file by matlab?

[Image Analyst]

What about the File Exchange submission suggested in your duplicate post?