質問

constructing a time variable in matlab
Dear all, I have a matrix data= [9 30 0 9 30 0 9 30 0 9 30 0 9 30 ...

約5年前 | 1 件の回答 | 0

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質問

changing the format of a cell matrix
Dear all, I have this cell matrix 'data', where as you can see below the element for example 8:00:06 is the hour-minute-secon...

5年以上前 | 1 件の回答 | 0

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cubic spline regression and plot
Any help?

5年以上前 | 0

質問

cubic spline regression and plot
Dear all, I have two variables X and Y. X and Y are both vectors of dimension 8561X1 For example: X=[ 1 1 ...

5年以上前 | 2 件の回答 | 0

2

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質問

less than or equal and greater than of equal operations
Dear all, I have this vector DIFF=[ 0 0.0500 -0.0200 0.0100 -0.0400 0 0 ...

5年以上前 | 2 件の回答 | 0

2

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質問

fmincon: Matrix is singular to working precision.
Dear all, I get the following message but the code seems to be working ok In fmincon (line 797) Warning: Matrix i...

6年以上前 | 0 件の回答 | 0

0

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質問

maximizing a function with a nonlinear constraint using fmincon
Dear all, I have a function 'fun' which I want to maximize with respect to four unknowns: x(1) x(2) x(3) and x(4) under th...

6年以上前 | 1 件の回答 | 0

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質問

solving an equation recursively
Dear all, I want to solve the following equation m(t)=a(t)+k*m(t-1); t=2,...T for the entire path m(t), with the...

6年以上前 | 1 件の回答 | 0

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質問

setting up the ''options' in fmincon
Dear all, I want to maximize a function, where the univariate unknown, x, with respect to which the maximization takes place ...

6年以上前 | 1 件の回答 | 0

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質問

Setting up the fminunc function
Dear all I want to maximize a function, where the univariate unknown, x, with respect to which the maximization takes place is b...

6年以上前 | 1 件の回答 | 0

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質問

finding the maximun of a function along with hessian matrix
Dear All, I have the following function f=-1/2*log(2*pi) -.5*(x+a*b) -.5*y./exp((x+a*b) ) -1/2*log(2*pi*c)-0.5*(x-d*(1...

6年以上前 | 1 件の回答 | 0

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質問

solving a nonlinear equation faster
Dear all, I want to solve this equation -0.5+ 0.5*a*exp(-x-b*c) -(x-d)/e=0 where a,b,c,d are known quantities that ch...

6年以上前 | 1 件の回答 | 0

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質問

Solving a nonlinear equation with time-varying parameters
Dear all, I want to solve this nonlinear equation: (a*b*exp(-c*d))*exp(-x)+2*b -2*x-b=0, where in each iteration of the ...

6年以上前 | 1 件の回答 | 0

1

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質問

Using kronecker product and elementwise multiplication
Dear all, I have the matrix der=[2 5 ;3 4] OMEGA=kron(eye(2),der); Suppose that now I have the 1 by 2 vector y ...

6年以上前 | 2 件の回答 | 0

2

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質問

Inverse wishart parameter estimates
Dear all, For beta distribution and gamma distribution there are the functions betafit and gamfit, respectively. Is there...

7年弱前 | 0 件の回答 | 0

0

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質問

Can I find the inverse of a sparse matrix faster?
Dear all, I have the following code T=2000; NN = speye(T) + sparse(2:T,1:(T-1),2*ones(1,T-1),T,T); u = NN\eye(...

約7年前 | 2 件の回答 | 0

2

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質問

How to divide a large sparse matrix
Dear all I have NN = speye(T) + sparse(2:T,1:(T-1),2*ones(1,T-1),T,T); and I want to calculate zz=(NN\( eye...

約7年前 | 1 件の回答 | 0

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質問

constructing identifiers for a large panel data
Dear all, I have a panel data of 180 countries covering the period 2000-2010. Here is a sample: list={'Australia' ...

約7年前 | 1 件の回答 | 0

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質問

How can we find the non common strings from multiple columns
Dear all, I want to compare the following three columns of strings (of different length) and find the entries that are NOT ...

約7年前 | 2 件の回答 | 0

2

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質問

how to select particular rows from a matrix
Dear all, I have a panel data set(countries, years) of dimension 20000 by 200. My goal is 1) to choose those countries ...

約7年前 | 2 件の回答 | 0

2

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質問

how do we plot a bivariate normal distribution from one side?
Dear all I plot the following bivariate distribution mu = [0 0]; Sigma = [.25 .3; .3 1]; x1 = -3:.2:3; x2 = -3:.2:3; ...

7年以上前 | 1 件の回答 | 0

1

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質問

Where can I run my Matlab code.
Dear all, I conduct some simulation studies but my laptop is not very fast. Could I run this code to a more powerful pc? Doe...

8年以上前 | 2 件の回答 | 0

2

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質問

Generating random draws from a specific poisson distribution
Dear all, I have the following variation of the poisson distribution P(Y=y)=((mean/vbn)^(y))*(nv^(y-1))*(exp(-mean*nv/vb...

8年以上前 | 1 件の回答 | 0

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質問

How we generate random variates from a generalized poisson distribution?
Dear all, I want to use generate draws from the "generalized poisson distribution". Is there any function in matlab to do that...

8年以上前 | 1 件の回答 | 0

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質問

Find maximum of a function.
Dear all, I have the following code that aims at maximixing LL_all with respect to "gidraw" which is scalar. %the dat...

8年以上前 | 1 件の回答 | 0

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質問

inv(A) versus /A. Which of the two is the correct one
Hi all, Let B be a n by 2 matrix and A is a 2 by 2 positive definite matrix. Which of the following two is correct ...

約9年前 | 1 件の回答 | 0

1

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質問

Is it possible to run my matlab code at another workstation?
Dear all, Unfortunately, my personal laptop is not very strong and it takes days to run my Matlab code. Is it possible to run...

9年以上前 | 0 件の回答 | 0

0

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質問

reshaping tables and calculating combination of differences between variables
Hi all, I would like to reshape the following table Area time rates A1 2008 13 A1 2009 12 A2 2008 11 ...

12年弱前 | 0 件の回答 | 0

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質問

converting a string of variables to numbers
HI all I have the varible Country Austria Austria Austria Austria Austria Austria...

12年弱前 | 1 件の回答 | 0

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質問

grouping observations with specific characteristics
Hi all, I have the following table in excel time country Location price2 1/09 Austria l1 12 2/09 Austria l1 4 3/09 Au...

12年弱前 | 1 件の回答 | 0

1

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