The result includes, essentially, all the terms in (x+y) and (x+y)^2,
and so on up if you chose a higher power. It is not just the
second-degree terms.
On Fri, Sep 16, 2016 at 7:43 PM, Nirav Patel wrote:
> Doc says:
>
> Take a 2-variable feature vector as an example: (x,
Doc says:
Take a 2-variable feature vector as an example: (x, y), if we want to
expand it with degree 2, then we get (x, x * x, y, x * y, y * y).
I know polynomial expansion of (x+y)^2 = x^2 + 2xy + y^2 but can't relate
it to above.
Thanks
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