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matrix element in summation sign

2 vues (au cours des 30 derniers jours)
lo
lo le 10 Mar 2014
Modifié(e) : Mischa Kim le 10 Mar 2014
I have 2 matrix A=[a;b;c] and B=[d;e;f]
Now I want the answer of
So I type the code
syms i
symsum(A(i)*B(i),1,3)
Then there is an error "Indexing input must be numeric, logical or ':'."
But what I mean is A(1)*B(1) + A(2)*B(2) ...
So what is the correct code for this question?

Réponses (1)

Mischa Kim
Mischa Kim le 10 Mar 2014
Modifié(e) : Mischa Kim le 10 Mar 2014
Lo, use
syms a b c d e f
A = [a; b; c];
B = [d; e; f];
sum(A.*B)

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