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How to Multiply a number to a row of matrix

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Tran Thien
Tran Thien 2017-12-23
评论： akhil soni 2020-9-3
For example i have matrix
A = [ 1 2 3 ; 3 4 5]
I want to multiply 2 to the 2nd row of the matrix so i got
A = [ 1 2 3 ; 6 8 10]

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采纳的回答

Star Strider
Star Strider 2017-12-23
Use bsxfun to multiply the first row by 1 (so it remains the same), and the second row by 2:
A = [ 1 2 3 ; 3 4 5];
A = bsxfun(@times, A, [1; 2])
A =
1 2 3
6 8 10

更多回答（1 个）

David Wilson
David Wilson 2017-12-26
or if you have a recent version of Matlab, then one can avoid the cryptic bxfun with
>> A.*[1;2]

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