Why isn't array division commutative?

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João André
João André 2013-12-1
回答： Youssef Khmou 2013-12-1
I have two linear segments (that follow y=mx+b) stored in two data arrays a1 and a2 and want to find the proportionality between them, so that a1=c*a2; However, the output scalar of a1/a2 does not verify this. How can I find the scalar by which a1 must be multiplied to obtain a2?
Thanks in advance.

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Youssef Khmou
Youssef Khmou 2013-12-1
Andre, you mean that a1 and a2 are linearly dependent? then you divide a2 by a1 you obtain a matrix , the diagonal of that matrix contains the same element which is the scalar, here is an example :
a1=randn(10);
a2=a1*5;
f=diag(a2/a1);
F=f(1)

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