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Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: Row-specific scalar multiplication
Replies: 5   Last Post: Mar 15, 2011 12:53 PM

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Abed Alnaif

Posts: 13
Registered: 10/21/08
Row-specific scalar multiplication
Posted: Mar 12, 2011 4:12 PM
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Hi,
I'm trying to do row-specific matrix multiplication. I know that this is confusing; it is best described by an example:

For example, say that I have:

f = [2; 4];

A = [1 2 3; 1 2 3];

I'm trying to find an operation such that

f .* A

returns

[2 4 6; 4 8 12]

In this example, I used the ".*" operation. However, this returns a Matlab error since the matrix dimensions do not agree. Does anyone know of a way to accomplish what I am trying to do, without resorting to loops?

Thanks,

Abed Alnaif

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