Forming limit diagram with strains

Hi, I was trying to recreate the forming limit diagram that was given from my professor, when strain3 is equal to 0.1, 0, -0.1 and -0.2. For some reasons I am not getting it. Any reasons why?

trueStrain2 = linspace(-0.5,0.5,100);

trueStrain1a = 0.0953-trueStrain2-0.1; % for deltaT = +10%

engStrain2a = exp(trueStrain2)-1;% minor eng strain

engStrain1a = exp(trueStrain1a)-1; % major eng strain

trueStrain1b = -trueStrain2; % for deltaT = 0

engStrain2b = exp(trueStrain2)-1; % minor eng strain

engStrain1b = exp(trueStrain1b)-1; % major eng strain

trueStrain1c = -0.1054-trueStrain2+0.1; % for deltaT = -0.1

engStrain2c = exp(trueStrain2)-1; % minor eng strain

engStrain1c = exp(trueStrain1c)-1; % major eng strain

trueStrain1d = -0.22314-trueStrain2+0.2; % for deltaT = -0.2

engStrain2d = exp(trueStrain2)-1; % minor eng strain

engStrain1d = exp(trueStrain1d)-1; % major eng strain

figure;

plot(engStrain2a,engStrain1a);

hold on

plot(engStrain2b,engStrain1b);

plot(engStrain2c,engStrain1c);

plot(engStrain2c,engStrain1c);

[Mathieu NOE]

hello

where do the equations from your code come from ?

[Ananya Tewari]

Please provide more information on the equations from your code and confirm whether they are correct.