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

Topic: matrix multiplication with zero dimensions
Replies: 11   Last Post: Jan 7, 2013 10:20 AM

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Matt J

Posts: 4,979
Registered: 11/28/09
Re: matrix multiplication with zero dimensions
Posted: Jan 6, 2013 11:36 PM
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"Roger Stafford" wrote in message <kcdg4j$n70$1@newscl01ah.mathworks.com>...
>
> Think of it this way, Matt. Consider the four multiplications:
>
> M3 = ones(3,3)*ones(3,3);
> M2 = ones(3,2)*ones(2,3);
> M1 = ones(3,1)*ones(1,3);
> M0 = ones(3,0)*ones(0,3);
>
> Each of the elements of 3 x 3 M3 is 3. Each of the elements of 3 x 3 M2 is 2. Each of the elements of 3 x 3 M1 is 1. Therefore by extension of this trend M0 should have 3 x 3 elements and each of them should be 0.
=============

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