Calculate power of exponential

How can i calculate , if A=[8 7 0] and B=[2 12 1];

I tried this code:

A = [8 7 0];

B = [2 12 1];

C = exp(A)

C*B

Matlab keeps giving error: Inner matrix dimensions must agree.

Answer 1

[Daniel Pollard]

Deleted my previous answer as I hadn't seen your edit so gave a wrong answer.

You need a . before the multiplication symbol. Try

A = [8 7 0];
B = [2 12 1];	
C = exp(A)
sum(C.*B)

C.*B computes element-wise multiplication of C and B, then sum them to calculate the do product.

[John D'Errico]

I don't think a sum was requested here.

[Daniel Pollard]

In the question, the asker specified that they're calculating a dot product . The dot product is defined by

for two vectors and .

[Steven Lord]

I see no mention of dot product in the question. But if that was the original posters request, use the dot function instead of the multiplication operators * or .* to compute the dot product.

[Daniel Pollard]

Are we seeing different versions of the question? To me it says

"How can I calculate , if A=[8 7 0] and B=[2 12 1]" before they outline what they tried and the error it returned.

Answer 2

[Mike]

C.*B

* by itself means matrix multiply

.* means multiply individual terms