Here is the corrected code:
% TF of the given system:
sys = rss(1);
% BODE Plot:
H=bodeplot(sys); % Generate Bode plot and get handle
% Get MAG and PHASE axes handles:
AX = findall(gcf, 'Type', 'axes');
% Extract Y-tick LABELS:
MAG_yticks = yticks(AX(1)); % MAGNITUDE plot
MAG_yticklabels = yticklabels(AX(1));
PHASE_yticks = yticks(AX(2)); % PHASE plot
PHASE_yticklabels = yticklabels(AX(2));
% Display the RESULTS:
disp('MAG Y-tick Labels:');
disp(MAG_yticklabels);
disp('PHASE Y-tick Labels:');
disp(PHASE_yticklabels);
