Question

so we have this matrix a=[1;2;3] and we want to multiply it by itself a*a,

However Matlab doesn’t do this multiplicaiton, and suggests using a.^2 , but this only multiplies each member by itself ( 1;4;9 )…

so how to multiply in Matlab a*a (a^2) ??

Greeed

Answer 1

You can’t multiply it by itself, because it’s not square.

You can multiply it by its transpose, though:

a * a'

or:

a' * a

Which one you use depends on what you want. But it sounds like you don’t know what you want (otherwise there would be no question…)