how should i subtract two matrices

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omar mahallawy
omar mahallawy 2019-3-14
回答： Alex Mcaulley 2019-3-14
i need to subtrabt the first row B with the first number A
A=[ 6 12 15]
B=[50 70 80 90
20 50 40 30 % please note that vector B is a result of a for loop
10 60 80 90]
answer [44 64 74 84
8 38 28 18
-5 45 65 75]

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采纳的回答

Alex Mcaulley
Alex Mcaulley 2019-3-14
A=[ 6 12 15];
B=[50 70 80 90;
20 50 40 30;
10 60 80 90];
C = B-repmat(A',1,4);

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