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A mathematical expression w/ >1 term containing the same variable (eg, x & x^2). Polynomials are commonly used to model curvilinear relationships.

4 votes

What makes linear regression with polynomial features curvy?

If you have a single independent variable x and a single dependent variable y, then "y = f(x)" is usually considered as two dimensional even if the relationship between these two variables is complica …
James Phillips's user avatar
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Can polynomial regression be used to handle data with more than one dimension?

Here is an example 3D surface quadratic polynomial and data. …
James Phillips's user avatar
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How to explain the result of this polynomial equation?

As you can see from the 3D scatterplot, the posted data seems rather noisy with both a "vertical" section and a "flat" section. The best I could find from an equation search was "Y = a * pow(X1, b) + …
James Phillips's user avatar