Subscripted assignment dimension mismatch

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trilochan
trilochan 2013-10-14
评论： trilochan 2013-10-14
hi i'm new to Matlab and i am working on a project in genetic algorithm. i'm getting an error saying Subscripted assignment dimension mismatch. can anyone tell me what does this error means. this is my objective function
function f = myfunction(x)
cc= (-138.71*log(x))+1727.1;
sv=0.1*cc;
i=0.06;
LT=15;
f(x) = ((cc*x)-((sv*x)*(1/((1+i)^LT))))*((i*(1+i)^LT)/(((i+1)^LT)-1));

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Walter Roberson
Walter Roberson 2013-10-14
Why are you assigning the output to f(x) and not to f alone?
You should be considering whether x can ever be a 2D array. If it can, then your cc would be a 2D array, and then cc*x would be matrix multiplication rather than element-by-element multiplication; the same with sv*x
I note, by the way, that it would be more efficient to calculate (1+i)^LT once and then use the resulting variable three times in your f(x) instead of those several occurrences of the expression.

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