%if its possible try to convert the variables to a struct then perform the
%calculations
var1 = load('2sn0dB.mat');
var2 = load('3sn0dB.mat');
var3 = load('4sn0dB.mat');
var2.one = var1.one + 0.5; %add 0.50 to the one of 2sn0.mat
var3.one = var2.one + 0.6; %add 0.60 to the newly formed array 'one' of 3sn0.mat
save('2sn0dB','-struct','var1');
save('3sn0dB','-struct','var2');
save('4sn0dB','-struct','var3');
please do accept the answer if it solved your issue , it will help others in the community
