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Alex


Last seen: 2 years 前 |  自 2016 起处于活动状态

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Wrong Hessian output in fminunc
Can somebody explain weird Matlab's output for the following optimization problem? The goal is to minimize and to evaluate Hess...

4 years 前 | 3 个回答 | 0

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Estimate parameters (multivariate t distribution)
Hello! Is there a built-in function in Matlab that estimates parameters of a multivariate t distribution (scale matrix, degree...

4 years 前 | 0 个回答 | 1

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Constrained ARIMA parameter estimation
Hello! How do I estimate the parameters of ARIMA model with lower bounds on the parameters (constrained optimization)? I'm cur...

5 years 前 | 0 个回答 | 0

0

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ARIMA model (infer the inputs)
Hello! I have to estimate the following MA(1) model where is available time series. I can estimate the model parameter an...

5 years 前 | 0 个回答 | 0

0

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Date and number (hour) to times
I have two columns: First - Date (for example, 24-Jun-2015); Second - Hour for that Date (for example, 9, i.e., just a number of...

5 years 前 | 1 个回答 | 0

1

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Why simple expression is not simplified (Symbolic Toolbox)?
Quite simple code syms a b assume(a,'real'); assume(b,'real'); simplify((-1)^a*(b-1)^a) The answer is obviously (1-b)...

6 years 前 | 1 个回答 | 0

1

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Estimating GARCH(1,1) model with fmincon
Hello! I have the script that estimates GARCH(1,1) model, but for some reason I obtain parameter estimates that are a little ...

8 years 前 | 1 个回答 | 0

1

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