multiply two vectors, component by component [closed]

multiply two vectors, component by component [closed]



Would like to take two vectors and multiply components at the same index.For example a1, a2, a3 x b1, b2, b3 to produce a1 b1, a2 b2, a3 b3.
The following works, but are there some alternatives?


aMat = DiagonalMatrix[a1, a2, a3];
bMat = DiagonalMatrix[b1, b2, b3];
Diagonal @ Dot[aMat, bMat]
result: a1 b1, a2 b2, a3 b3



This question appears to be off-topic. The users who voted to close gave this specific reason:





$begingroup$
a1,a2,a3*b1,b2,b3 will give the required answer
$endgroup$
– mikado
Sep 8 '18 at 19:22


a1,a2,a3*b1,b2,b3




1 Answer
1



No need to do anything fancy. This is just how ordinary list multiplication works:


a1, a2, a3 b1, b2, b3



yields


a1 b1, a2 b2, a3 b3





$begingroup$
thanks! didn't even think to try that.
$endgroup$
– user6546
Sep 8 '18 at 19:25

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