Michael Stollenwerk

Last seen: 約1年前 | 2020 年からアクティブ

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質問

Fill up submatrix along third dimension with two dimensional matrix
Given a p by p by N array, e.g. p=3 and N=4, x = NaN(3,3,4); I can easily fill up the 1 by 1 by N submatrix given a "1 by 1 m...

3年以上前 | 2 件の回答 | 0

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質問

Provide partial gradient and Hessian to fminunc.
I have the gradient and Hessian in closed form only for a subset of the variables of my objective function. As an example consid...

3年以上前 | 1 件の回答 | 0

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質問

Matlab turns char into double on cluster.
On the cluster I run matlab -nodesktop -r "program 1" > program_1.out 2>&1 where the first lines of code in "program" look li...

4年弱前 | 1 件の回答 | 0

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質問

How to call objective function in outputfcn or plotfcn during optimization?
I want to minimize a complicated objective function. It returns 1. objective function value and 2. some fit data (like the fitte...

4年以上前 | 1 件の回答 | 0

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質問

Constructing large covariance matrix from correlations and covariances gives non positive definite matrix.
Let's create a large correlation matrix (simply a symmetric matrix with ones on the diagonal and values between -1 and 1 on the ...

4年以上前 | 0 件の回答 | 0

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質問

Permutations of ordered set where only one object changes its position.
Is there a quick way to get all possible permutations where we put one object at all position, while keeping the order of all ot...

4年以上前 | 1 件の回答 | 0

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質問

Combining cell arrays with empty doubles
Suppose I have two cell arrays, with a = cell(1,2); a{1} = 1; b = cell(1,2); b{2} = 2; How can I quickly combine the two t...

約5年前 | 2 件の回答 | 0

2

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質問

What happens if I use parfor and the fmincon/fminunc option "UseParallel" together?
I want to minimize the same objective function using different starting points. I have cores available. I have . Consider the...

約5年前 | 1 件の回答 | 1

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質問

mex-file crashes MATLAB in for loop
When I call the mex function (which was created using my c code below) in a for loop, it crashes Matlab after several runs. Do y...

5年以上前 | 1 件の回答 | 0

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