Matlabbatch in the SPM, Item 'Session', field 'val': Value must be either empty, a cellstr or a cfg_dep

Question

Natalia Hanna 2024-10-21

0
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https://ww2.mathworks.cn/matlabcentral/answers/2161110-matlabbatch-in-the-spm-item-session-field-val-value-must-be-either-empty-a-cellstr-or-a-cfg_

回答： Manikanta Aditya 2024-11-12，16:52

I am creating a matlabbatch for relignment in SPM, Matlab.

I am looping through the runs (8) and images (482 per run), but get a following error:

Item 'Session', field 'val': Value must be either empty, a cellstr or a cfg_dep.

I have created a sample batch in SPM and opened the code. I discovered that each path to the image i the matlabbatch ends with ...nii, 1

But the paths that I add to images are all ending with .nii. Could that create a problem? I have tried to append the path with ", 1", but all the solutions I have tried change the cell number in the batch and create another error.

Right now my data in matlabbach is 8 columns with 482x1 cell each (482 images for each run i each cell). Each column represents one session in SPM GUI in my understanding. Could someone please help me with that? - appending the image_file path with ",1" if that can cause an issue or explain what other issues there could be. Here are the loops in my code.

for run = 1:length(run_folders)

image_path = fullfile(sub_dir, run_folders(run).name);

fprintf('Checking image path: %s\n', image_path);

% Getting the volumes

image_file = dir(fullfile(image_path, sprintf("fConcept_RelRel_Pilot_%s_run%d_*.nii", subjects{sub}, run)));

num_images = length(image_file);

matlabbatch{1}.spm.spatial.realign.estwrite.data{run} = cell(num_images, 1);

% Filling the data_cell with image paths

for image = 1:num_images

matlabbatch{1}.spm.spatial.realign.estwrite.data{1,run}{image,1} = cellstr(fullfile(image_path, image_file(image).name));

end