How to convert this equation to matlab code ?

Dear all,
I need you help to convert this equation to matlab code pls ?
Thank you so much

3 个评论

What have you tried so far?
How do you plan to deal with the fact that there are two different equations, depending on the value of sigma?
I am asking because you can learn more by making a strong attempt on your own, before geettinghelp from others.
Thereare many variables in this equation. I suggest you make a list of all of them, and of a typical value for each.
Evaluate the equation with Excel or some other tool, to check your work.
Good luck, and please reply with your attempts so far.
(Answers Dev) Restored edit

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 采纳的回答

syms epsilon_t0_2 E_0 n sigma sigma_0_2 sigma_1_0 n_prime_0_2_1_0
E_0_2 = (sigma_0_2 * E_0)/(sigma_0_2 + 0.002*log(E_0))
E_0_2 = 
part1 = sigma/E_0 + 0.002 * (sigma/sigma_0_2)^n
part1 = 
part2 = (sigma-sigma_0_2)/E_0_2 + (0.008 - (sigma_1_0 - sigma_0_2)/E_0_2) * ((sigma - sigma_0_2)/(sigma_1_0 - sigma_0_2))^n_prime_0_2_1_0 + epsilon_t0_2
part2 = 
eta = piecewise(sigma <= sigma_0_2, part1, part2)
eta = 

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