MATLAB: Left and right sides have a different number of elements

Question

Getting error with this line, please advise,

Thanks!

dA(i)=(rate_a(i).*F.*Q)-(rate_b(i).*F.*L)-(rate_c(i).*F);

left and right sides have a different number of elements

Answer 1

My guess is that ‘A’, ‘B’ and ‘C’ are vectors, or you would not be subscripting them.

You need to subscript them here as well:

 dA(i)=(rate_a(i).*A.*B)-(rate_b(i).*A.*C)-(rate_c(i).*A);
 dB(i)=(rate_b(i).*A.*C)-(rate_a(i).*A.*B)-(rate_d(i).*B);
 dC(i)=rate_d(i).*B;

or you will continue to have a dimension mismatch.