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Topic: Matrix Dimensions must agree.
Replies: 1   Last Post: Feb 12, 2013 11:33 AM

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Curious

Posts: 2,006
Registered: 12/6/04
Re: Matrix Dimensions must agree.
Posted: Feb 12, 2013 11:33 AM
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"Erik" wrote in message <kfdpbk$kdp$1@newscl01ah.mathworks.com>...
> I have this:
> t= [0:100];
> L = 100;
> k = [.1 .3 .7];
> C = 25;
>
> i want to multiply
> -k .* t
>
> but i get an error message saying matrix dimensions must agree.
> I thought the . before the * would get rid of that error but it doesn't. what is going on???


Well, k has 3 elements and t has 101.

How do you expect the results to look like by multiplying 3 things by 101 things?

Do you want an array of 3X101 or 101X3 perhaps?

Maybe something like:

-k*t'



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