I can't detect error in formula

There's an error in this code which I failed to detect. Hopefully someone can help me. Thank you in advance.

T3(t,1)=(((q_inc*z_env*d_abs)*((1/zeta3)+((1-zeta4)*delta3/(zeta4*delta4)))+sigma*pi*delta3*(T4(t,1))^4)/(sigma*pi*delta3))^(1/4);

Also, I am also don't understand what does the picture means. Im still new with MATLAB.

Answer 1

[Sulaymon Eshkabilov]

Without the knowledge of your variables and their size, one point is clear that is an elementwise operation is needed for * and /. Thus, .* and ./ are to be introduced in the equation, see e.g.:

T3(t,1)=(((q_inc*z_env*d_abs).*((1./zeta3)+((1-zeta4).*delta3./(zeta4.*delta4)))+sigma.*pi*delta3.*(T4(t,1)).^4)./(sigma.*pi*delta3)).^(1/4);

Answer 2

[Star Strider]

The error indicates that the exponentiation needs to be element-wise, using .^ rather than ^ —

T3(t,1)=(((q_inc.*z_env.*d_abs).*((1./zeta3)+((1-zeta4).*delta3./(zeta4.*delta4)))+sigma.*pi.*delta3.*(T4(t,1)).^4)./(sigma.*pi.*delta3)).^(1/4);

(This makes all the operations element-wise.) However, unless all the vectors are column vectors, and ‘t’ is an integer greater than 0, the assignment is going to fail.

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