dot product between two different size of matrix

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Alan
Alan 2020-12-18
评论： James Tursa 2021-12-14
Hello,
I have two matrix, one is A (1by 3 matrix), the other one is B (86 by 3 matrix). And I would like to calculate the dot product of dot(A,B). However, A and B are not the same size, so dot(A,B) function can not be performed successfullly.
How can I calculate the dot product between two different size of matrix without using for loop?
Many thanks!

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Ive J
Ive J 2020-12-18
X = sum(bsxfun(@times, A, B), 2);

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James Tursa
James Tursa 2020-12-18
Assuming everything is real and by "dot product" you aren't involving complex conjugates, simply this
C = B * A';
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James Tursa
James Tursa 2021-12-14
@Prajwal Sridhar Try it and see if it does what you want. If it doesn't, then open up a new Question and post a small example of inputs and desired output.

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