# Tagged Questions

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### Find the asymptote of an experimental dataset

I have an experimental dataset that looks roughly like this (this figure is a stand-in I created based on a function with a random part): Just looking at the dataset it seems to have a horizontal ...
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### Aproximate data with this equation (or linearize the equation)

I have found an equation that describes the behaviour of a phisical system: $$y=a_1e^{-a_2x} + a_3 + a_4x + a_5e^{{-a_6} / {(1-x)}}$$ Now I have data of that physical system and I want to ...
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### Scaling data into $[-1,1]$

I have a data in the matrix for: \begin{bmatrix} 1 & 2 & 3 & 9 & 6\\ 8 & 2 & 7 & 4 & 6 \\ 1 & 2 & 8 & 7 & 4 \end{bmatrix} Each row corresponds ...
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### Large Regression dataset

For a project I need a large regression (least squares) dataset: If $n$ is the number of samples and $p$ the number of features, then I need $p < n$ and $p,n$ both very large. For example ...
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### Weird formula for linear regression

I'll try to make the matter as clear as possible given the circumstances. My boss asked me to look at an old report a former employee wrote around a couple of months ago. Apparently the report ...
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### Non-close-form Regression Research

As I try to process some physic experiment data that I don't have the closed form formula with unknown parameters, I have to use some regression models like polynomials or normal distributions . The ...
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### Mathematical model building with dependent and independent variables

I have been working with data and building models on data. I have developed models in regression using cubic and power series. It works fine for variables with one dependent and one independent ...
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### how to calculate a curvature/angle of best fit line segments

I have data points from a power spectrum (fft) output that look like the image below. A characteristic of the data seems to be a heavy slope and then a flattening out. I would like to be able to ...
289 views

### Curve fitting with upper and lower bounds for derivatives

I compute (at a great cost) upper and lower bounds $f_u(x)$ and $f_l(x)$ of an unknown function $f(x)$ at points $x$ in $[0,1]$. Now I am interested in an estimation of the derivative $f'(x)$. I ...