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101_software/fit_EMG.m

+function [mACC EMG_overall] = fit_EMG(emgdata,emg_check,t_BP_ms,t_emg_,cfg,sub)
+%UNTITLED Summary of this function goes here
+%   Detailed explanation goes here
+
+%define variables
+n_sub = 1;
+n_trials = 96;
+
+% take different trials into accoutnt
+if str2num(emg_check(sub).ID)<50;    
+    trials = [cfg.blck_idx{1}(1):cfg.blck_idx{3}(end) 249:256];
+else
+    trials = [cfg.blck_idx{1}(1):cfg.blck_idx{4}(end)];
+end
+
+c_a = 1; %counter accuracy
+
+
+c1_all = zeros(n_sub,n_trials);
+c2_all = zeros(n_sub,n_trials);
+c1 = zeros(n_sub,n_trials);
+c2 = zeros(n_sub,n_trials);
+c = [];
+cca = [];
+
+
+    for t = 1:n_trials
+
+        satt2 = movstd(emgdata{sub,trials(t)}(1,:),125); %125 sample windows, you can play around with this parameter and check in the loop above
+        satt = std(emgdata{sub,trials(t)}(1,:)); %STD for right(1) channel
+        c = find(satt2 >(t_emg_*satt)); % first exceed thresh STD
+
+        %including button press rigth hand
+        if ~isempty(c) 
+            c1_all(1,t) = c(1); % BP sample
+        end
+
+
+        %indices without button press
+
+        % right hand
+        if ~isempty(c) && c(1) < size(emgdata{sub,trials(t)}(1,:),2)-t_BP_ms*(cfg.EMG.srate/1000)%<- threshold to account for the button press (750 ms), check if index is lower so that movement is not derived from button press
+            c1(1,t) = c(1); % position where movavg exceeds std
+        end
+
+        %left hand // only when no movement in rigth hand
+        if isempty(c)
+            satt3 = movstd(emgdata{sub,trials(t)}(2,:),125);
+            satt4 = std(emgdata{sub,trials(t)}(2,:));
+            cca = find(satt3 >(satt4));
+
+            if ~isempty(cca) 
+                c2_all(1,t) = cca(1); % left hand only
+            end
+
+            if ~isempty(cca) && cca(1) < size(emgdata{sub,trials(t)}(2,:),2)-t_BP_ms*(cfg.EMG.srate/1000)%left hand without BP
+                c2(1,t) = cca(1);
+            end
+        end
+
+        %summed hands
+        summed = emgdata{sub,trials(t)}(1,:)+emgdata{sub,trials(t)}(2,:);
+        satt2 = movstd(summed,125);
+        satt = std(summed);
+        c = find(satt2 >t_emg_*satt);
+
+        if ~isempty(c) && c(1) < size(emgdata{sub,trials(t)}(2,:),2)-t_BP_ms*(cfg.EMG.srate/1000)
+            c1(1,t) = c(1); %-> stores all invalid trials
+        end 
+
+    end
+
+    c1(c1==0) = NaN;
+    c2(c2==0) = NaN;
+    c1_all(c1_all==0) = NaN;
+    c2_all(c2_all==0) = NaN;
+
+    %% EMG validity plots without invalid ME trials (discard marble drop)
+
+    EMG_overall = nan(1,n_trials);
+
+    for t = 1:n_trials
+       EMG_overall(1,t)  = emg_check(sub).trials_dur(t);
+       if isnan(c1(1,t))  && ismember(t,cfg.blck_idx{1,:}) | ismember(t,cfg.blck_idx{4,:}) % movement blocks
+           EMG_overall(1,t)  = NaN;
+       elseif ~isnan(c1(1,t)) | emg_check(1).trials_valid(t) == 0 && ismember(t,cfg.blck_idx{2,:}) | ismember(t,cfg.blck_idx{3,:}) % imagery blocks
+           EMG_overall(1,t)  = NaN;
+       end
+    end
+
+    ACCs = 100*[NaN_acc(EMG_overall(:,cfg.blck_idx{1,:})) NaN_acc(EMG_overall(:,cfg.blck_idx{2,:})) NaN_acc(EMG_overall(:,cfg.blck_idx{3,:})) NaN_acc(EMG_overall(:,cfg.blck_idx{4,:}))];
+    mACC = mean(ACCs);
+
+end
+