How to Multiplying matrices using for loops

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Mark  Hodges
Mark Hodges 2016 年 9 月 16 日
コメント済み: Walter Roberson 2016 年 9 月 16 日
I have to write a MATLAB code using for-loops to perform multiplication of both matrices. Not sure how to do this using for loops but A = [3 4 1; 1 2 3] B = [1 2 3; 4 5 6; 7 8 9] Need to Find A*B
Thanks everyone!

回答 (1 件)

Walter Roberson
Walter Roberson 2016 年 9 月 16 日
A.*B is not defined between matrices of difference sizes. It is not possible to write code for it.
The .* (otherwise known as times) operator is for element-by-element multiplication. If you are looking for algebraic matrix multiplication then the operator to read about is * (otherwise known as mtimes)
  2 件のコメント
Mark  Hodges
Mark Hodges 2016 年 9 月 16 日
My apologies, I didn't mean to add that, it's fixed
Walter Roberson
Walter Roberson 2016 年 9 月 16 日
https://en.wikipedia.org/wiki/Matrix_multiplication#General_definition_of_the_matrix_product

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