Multiplication implementation help?

1 次查看（过去 30 天）

Steve 2011-10-6

Hello Experts,

I need to write MATLAB code and to build a product like this:

for i from 1 to d, multiplication (x(i)-x(j)). x is a row vector of size d.

Here is what I did:

    m = 0;
    for i=1:d
        for j=1:d
            if i~=j
               m = prod(x(i)-x(j));
            end
        end
    end

But I am not sure if I am right...can you please help me with this?

Fangjun Jiang 2011-10-6

format your code next time

Steve 2011-10-6

But am I right?

Fangjun Jiang 2011-10-6

You need to initialize m=1 and then do m=m*(x(i)-x(j)), or m=prod([m,x(i)-x(j)]). Use a test vector of x to verify the result.

Steve 2011-10-6

Thank you very much!

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