Here is my code for my work and my data is already set up in columns on excel. The problem I'm getting is that my standard devation corridors are not filling up with the desired colors for both plots. Why might that be so? Attached is my code and the result of it. Thanks for your help in advance.
tensile_stress = dataset(:,1); % your mean stress;
tensile_strain = dataset(:,2); % your mean strain;
std_dev_tensile_stress = dataset(:,3); % your std of stress;
surrogate_stress=dataset(:,4); % mean surrogate stress
surrogate_strain=dataset(:,5); % mean surrogate strain