--- a
+++ b/preprocessing/seed.m
@@ -0,0 +1,40 @@
+% An example to get the SEED dataset
+% Just an example, you should change as you need.
+
+% band pass to 4-47 Hz, standardization
+% 15 subjects - 3 sessions - 15 trials
+% sample rate 200 Hz
+% label: -1 for negative, 0 for neutral and +1 for positive
+% label changes to 0 1 2
+
+% Save file S1_1_1  (channels, samples)
+
+file_list = load('./seed_file/namefile_list.mat');
+file_list = file_list.namefile_list;
+short_name = load('./seed_file/short_name.mat');
+short_name = short_name.short_name;
+label = load('./seed_file/label.mat');
+fc = 200;
+Wl = 4; Wh = 47; 
+Wn = [Wl*2 Wh*2]/fc;
+[b,a]=cheby2(6,60,Wn);
+
+for i = 1:15 % subject
+    for j = 1:3 % session
+        file_pre = file_list(i,j);
+        file_path = strcat('/Datasets/SEED/Preprocessed_EEG/',file_pre,'.mat');
+        session_data = load(file_path);
+        for k = 1:15 % trial
+            trial_data = eval(strcat('session_data.',short_name(i),'_eeg',num2str(k)));
+            % trial_data = filtfilt(b,a,trial_data);
+            trial_mean = mean(trial_data,2);
+            trial_std = std(trial_data,1,2); 
+            trial_data = (trial_data-trial_mean)./trial_std;
+            trial_data = filtfilt(b,a,trial_data);
+            trial_label = label.label(k);
+            saveDir = strcat('/Datasets/SEED/seed_save/S',num2str(i),'_',num2str(j),'_',num2str(k),'.mat');
+            save(saveDir,'trial_data','trial_label');
+        end
+    end
+end
+