# Tagged Questions

31 views

### How to interpret coefficients in polynomial regression?

I am working on my thesis (study) about poverty incidence rate and its socio-economic factors using second-order polynomial regression without interaction. The final model in my study is ...
22 views

### Parabolic regression with restricted shape

How can I calculate the parabolic regression with vertex at minimum. Is it possible? I have a set of points from which I estimate the parabola using the (I believe) standard equation (from ...
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### Is there a way to fit an even function using only odd functions?

I was wondering if there is a way to make an infinite series of odd functions equal to an even function. For example, I would like to know if the next equation is valid ...
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### How do I solve the weighted normal equations?

I am trying to solve the normal equations for a 3D LSE of a general quadric: $$z = ax^2 + bx + cxy + dy^2 + ey + f$$ Write as a vector equation: $$\vec{z}= \bf{X}\vec{\beta}$$ where the 'ith row ...
191 views

### Bare minimum of points in multiple polynomial regression

I have a question on multiple polynomial regression and the absolute minimum amount of points in the different terms. The minimum amount of points required for a second order polynomial would (in one ...
235 views

### Fitting a 3d point cloud with a polynomial surface

I have 3D point cloud and I would like to fit a polynomial surface to it. Could anybody please explain the step by step process to that. Thanks a lot.
146 views

### How to find the best (integer) polynomial equation?

This is a continuation of How to find curve equation from data? I asked earlier. I am looking for both a formula and the method to find the best (integer) polynomial that fits my data. I still ...
85 views

### Polynomial and exponential regression [duplicate]

Possible Duplicate: Determining computational complexity of stochastic processes I have some points $(x_i,y_i)$ generated by a program. These values are not exact, but are random ...
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### How do I transform the coefficients of a solved polynomial curve fit?

This all pertains to a piece of software I am writing but figured I'd get a better answer here than in Stackoverflow. I have no problem migrating the question if needed. Disclaimer: I am a software ...