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Yufei Cao


Last seen: 2 mois il y a |  Actif depuis 2018

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Question


how to define matirx series?
Dear community, I want to define a matirx series whose each element is a matirx. For example, a1 = randn(2,2); a2 = randn(2,2...

environ 2 ans il y a | 1 réponse | 0

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réponse

A répondu
How can I adjust the vertical line spacing in the MATLAB Editor?
i have the same question. How to solve it?

environ 2 ans il y a | 0

Question


increase line-spaces in .m files?
Dear community, Thanks in advance. I use monospaced with size 18 when I code in the .m files, but I find that the scripts make...

environ 2 ans il y a | 1 réponse | 0

1

réponse

Question


Is expm accurate to compute transition probabilities for a continuous-time Markov chain?
I have the following Q-matrix for a continuous time Markov chain and use expm to compute transition probabilities. syms t posit...

presque 3 ans il y a | 1 réponse | 0

1

réponse

Question


why expm dose not show parameters?
I use expm to symbolically compute martix exponential . syms x [1 2] syms t A = [-x(1)-x(2) x(1); 0 -x(2)]; B = expm...

presque 3 ans il y a | 1 réponse | 0

1

réponse

A répondu
Causes of Rank Deficiency when Fitting GARCH models
I have the same problem.

environ 3 ans il y a | 0

Question


Plot datetime data from a cell array?
I have data set shown in fig. But I do not how to access to the data. I try to use: plot(index{2:end, 1}, cell2mat(index(2:end,...

environ 3 ans il y a | 1 réponse | 0

1

réponse

Question


I have the errors when learning GARCH: lags must be unique, positive integers?
I am not sure why I have this error when using name-value to define lags. Any ideas?

environ 3 ans il y a | 1 réponse | 0

1

réponse

Question


Plot variables with similar names.
I have the following double variables and the names are var_1 var_2 var_3 var_4 var_5 ... var_30. I need to plot them. ...

plus de 3 ans il y a | 2 réponses | 0

2

réponses

A répondu
write data to excel sheet column
After 8 years, is there a way to do this if the column number is bigger than z?

plus de 3 ans il y a | 0

Question


How to get standard errors from copulafit
Hello, Community, I try to fit a Gaussian copula by using rhohat = copulafit('Gaussian',u) How do I get the standard errors ...

environ 4 ans il y a | 1 réponse | 0

1

réponse

Question


How to find the minimum value of an integral using Matlab?
I want to find the value, which makes takes the minimum value. is given by ...

plus de 4 ans il y a | 1 réponse | 0

1

réponse

A répondu
AIC and BIC with copulafit
I have the same question.

plus de 5 ans il y a | 1

Question


replace a double in a array with a string BUT in specific Columns?
Suppose the matrix is A = [ 0.5 2 3 2.5 1 1 0.6 1 2 2.4 2 3 0.2 2 3 2.3 3 2] My question is to repl...

plus de 5 ans il y a | 1 réponse | 0

1

réponse

Question


Find the root of a double integral
why the following code cannot find the root of the function g(z). Note f(2)=6. So fzero(g,1) should return 2. syms x ...

plus de 5 ans il y a | 1 réponse | 0

1

réponse

Question


how to define a double integral with symbolic upper limits
I want to define a double integral, like this f(h) = \int_0^h (\int_0^1 xy dx) dy, where h is a variable. I try to use ...

plus de 5 ans il y a | 1 réponse | 0

1

réponse