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From: | aliko |
Subject: | generate polynomial features given a vector X and degree |
Date: | Mon, 19 Dec 2011 16:09:55 +0400 |
User-agent: | Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20111105 Thunderbird/8.0 |
Hi!Is there a function to generate polynomial features given a vector X and degree. For example I have 3-element vector X and for given degree=3 I want to get a vector like
[X(1), X(2), x(3), X(1)^2, X(2)^2, X(3)^2, X(1)*X(2), X(1)*X(3), X(2)*X(3), X(1)^3, X(2)^3, X(3)^3, X(1)^2*X(2), X(1)^2*X(3), ... , X(1)*X(2)*X(3)]
For any given vector X of any length and for any given degree?If there is no such function could anyone suggest an algorithm to build such a vector?
Thanks in advance!
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