1
vote
1answer
22 views

clustering of singular values

let us consider following graph of singular values i want to make some kind of clustering of these data,namely to seperate main components from non main components,let say signal components ...
1
vote
1answer
73 views

Nonlinear regression analysis of a vector

I'm trying to get a nonlinear fit of a vector in Matlab with no success. Let's assume that I have a vector called data: data = [1,30,250,55,22,76] which can be ...
0
votes
1answer
1k views

Matlab Time Series (AR, MA, ARIMA)

Is there a function which calculates an AR(p), MA(q), ARIMA(p,q) process in MATLAB which is free. I know of Econometrics toolbox, but I have to pay for that. Is there a way to get around that?
2
votes
2answers
360 views

Binary Logistic Regression Model Processing

Thanks for showing interest and wanting to help out. My aim is to develop a model that - as accurately as possible - predicts how entities in a population will either cooperate or defect, as a % of ...
1
vote
0answers
225 views

Confusion regarding confidence interval

I was using matlab's cftool to fit a regression line to my data point x and y. And I could see this ...
0
votes
1answer
321 views

Strange behaviour with ode45 in matlab, probably some numerical error.

I'm having a problem with a parameter estimation in a non-linear model. I think the culprit is that ode45 (an ode solver in matlab) is not properly solving my ode. It's the in red highlighted part, ...
0
votes
1answer
113 views

Linear algebra with a linear model (Matlab)

Given the equation $$r = B + e(r\cos(\theta))$$ and the corresponding data: $\theta: 0.88; 1.1; 1.42; 1.77; 2.14$ and $r: 3; 2.4; 1.65; 1.25; 1.01$ How do you input these data for matlab to ...
4
votes
2answers
735 views

Fitting an exponential function to data

I have a noisy data set (the grey line in the graph below) that corresponds roughly to $y=m(1-2^{-x/k})$ where m and k are unknown constants. How can I determine the best-fit value of m and k? I ...
1
vote
2answers
5k views

Find equation of curve fit programmatically in Matlab?

In MATLAB, when you plot something, there's a tool available which is called "curve fitting". And if you have a set of data points and a linear correlation, this tool will easily come up with an ...