Calculate power of exponential
2 views (last 30 days)
Show older comments
gio kapanadze
on 23 Apr 2021
Commented: Daniel Pollard
on 23 Apr 2021
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.
0 Comments
Accepted Answer
Daniel Pollard
on 23 Apr 2021
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.
4 Comments
Steven Lord
on 23 Apr 2021
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
on 23 Apr 2021
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.
More Answers (1)
Mike
on 23 Apr 2021
C.*B
* by itself means matrix multiply
.* means multiply individual terms
0 Comments
See Also
Categories
Find more on Logical in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!