vector multiplication and dot product
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pravin behera
on 11 Apr 2015
Answered: Roger Stafford
on 12 Apr 2015
i have 2 matrix and i want to do matrix multiplication, but the elements in matrix are vectors, so i want to take dot product of the elements, can u suggest me a way...
q=[a b;c d]*[e f]
where
a=[1 2 3]=b=c=d=e=f
the output will be [a.e+b.f ; c.e+d.f]
and expected output is [28;28]
please suggest a good way to tackle this problem
2 Comments
Jan
on 11 Apr 2015
Please post the matrix q in valid Matlab syntax. It is not clearly defined yet. Do you mean this:
q = [1,2,3,1,2,3; ...
1,2,3,1,2,3]
Accepted Answer
Roger Stafford
on 12 Apr 2015
You cannot have the grouping q = [(1 2 3) (1 2 3); (1 2 3) .... for ordinary matrices, but you can do this:
[1 2 3 1 2 3;1 2 3 1 2 3]*[1 2 3 1 2 3].'
where ".'" denotes the transpose and the result will be [28;28].
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