Matrix Multiplication (multiply every row of a matrix to different values)
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Dear all,
I am looking for a way to multiply every row of a matrix to different values? Let assume we have:
A=[1, 2, 3; 4, 5, 6; 7, 8, 9]
B=[a;b;c]
I am looking for a way to have:
C=[1*a, 2*a, 3*a; 4*b, 5*b, 6*b; 7*c, 8*c, 9*c]
Thanks in advance for your comments.
采纳的回答
Sean de Wolski
2011-2-28
or
C=bsxfun(@times,A,B);
更多回答（2 个）
Paulo Silva
2011-2-28
Just a little interesting thing I've done
syms a b c
A=[1, 2, 3; 4, 5, 6; 7, 8, 9]
B=[a;b;c];C=[];
for id=1:numel(B)
C=[C A(id,:)*B(id)];
end
C
The symbolic result (only works if you have the symbolic toolbox and a valid license for it) is
[ a, 2*a, 3*a, 4*b, 5*b, 6*b, 7*c, 8*c, 9*c]
The result is symbolic and you can use the subs function to replace the letters by numbers.
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