Multiplying each column with a corresponding row value

Question

Nany 2022-4-7

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https://ww2.mathworks.cn/matlabcentral/answers/1691080-multiplying-each-column-with-a-corresponding-row-value

评论： Nany 2022-4-7

Hi everyone,

Let's say I have a matrix of 1 x 5, and another matrix of 3 x 5. I want to multiply every element in each column with its corresponding row value, to obtain the following matrix "C"

A= [ 1 2 3 4 5]
B= [1 2 3 4 5, 6 7 8 9 10, 1 1 2 3 1]
C= [1 4 9 16 25; 6 14 24 36 50; 1 2 6 12 5] 

My original matrix has many rows that's why it's difficult to do it by hand

How can I do that?

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Answer 1

Matt J 2022-4-7

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https://ww2.mathworks.cn/matlabcentral/answers/1691080-multiplying-each-column-with-a-corresponding-row-value#answer_937240

在 MATLAB Online 中打开

A= [ 1 2 3 4 5]
A = 1×5
     1     2     3     4     5
B= [1 2 3 4 5; 6 7 8 9 10; 1 1 2 3 1]
B = 3×5
     1     2     3     4     5
     6     7     8     9    10
     1     1     2     3     1
C= A.*B
C = 3×5
     1     4     9    16    25
     6    14    24    36    50
     1     2     6    12     5