How to multiply one array to all elements of a vector with a different size?

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Shekoofeh Abdollahi
编辑： James Tursa 2022-1-27
Take
a=[1 2; 3 4]
and
b=[4 5 6]
How can I creat a 3D vector,
c(:,:,1)=a*b(1)
c(:,:,2)=a*b(2)
c(:,:,3)=a*b(3)
if I don't want to use a for loop. Is there any code for this multiplication in MATLAB?

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回答（1 个）

James Tursa
James Tursa 2022-1-27
编辑：James Tursa 2022-1-27
You can use implicit expansion with the element-wise multiply operator:
c = a .* reshape(b,1,1,[]);

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