Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 1-by-14.

Question

Edidiong Akpan 2019-3-5

0
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https://ww2.mathworks.cn/matlabcentral/answers/448456-unable-to-perform-assignment-because-the-size-of-the-left-side-is-1-by-1-and-the-size-of-the-right-s

回答： Sreelakshmi S.B 2019-3-8

My code is coming up with an error saying "Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 1-by-14." on the line highlighted by the asterix but the workspace shows that the variables P9 and z are both 1 x 14. the beginning of the if loop works, produces a 1 x 14 matrix with the first 2 cells populated by Pa and the remainder with zeros due to the error.

for i=1:14

if x(1,i) < Pcrit_c

P9(1,i) = Pa;

T9s = To5.*(P9./Po5).^((gamma_g-1)/gamma_g);

T9 = eta_n*(T9s-To5)+To5;

V9 = sqrt(2*Cp_g*1000*(To5-T9));

else

**** P9(1,i) = z;**** < this line

T9s = To5*(P9/Po5)^((gamma_g-1)/gamma_g);

T9 = eta_n*(T9s-To5)+To5;

V9 = sqrt(gamma_g*R*1000*T9);

end