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Viviana Arrigoni


2017 以来アクティブ

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質問


product of nonsingular matrices is singular?
I am generating this 1000x1000 real matrix A that is nonsingular. Linear algebra claims that det(A) = det(A') and that det(AA') ...

4年以上 前 | 2 件の回答 | 1

2

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質問


Running time worsening when matrices of size 2^k are involved.
I have experienced a worsening in the performances of a software when data of size 2^k for some k is involved. The problem is ve...

4年以上 前 | 0 件の回答 | 0

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質問


multiple vectors histogram plotting
I would like to plot a histogram like the one in the picture, the x axis is labeled with different matrix names, and for each th...

4年以上 前 | 1 件の回答 | 0

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質問


Scanning strings in a string array
I see that if I declare a string between ' ', I can have access to each single character. For instance: >> x = 'abc'...

4年以上 前 | 2 件の回答 | 0

2

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質問


Fiedler matrix determinant behaviour
With the following command I generate a 1000x1000 Fiedler matrix from the Matlab gallery: A = gallery('fiedler',rand...

5年弱 前 | 1 件の回答 | 0

1

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質問


Generate random permutation matrix
I am trying to generate a random square matrix A of dimension n that has one and only one 1 per row and column. My idea is the...

5年弱 前 | 2 件の回答 | 0

2

回答