Yi Wang

Last seen: 4 months 前 | 自 2022 起处于活动状态

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统计学

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Compute only a few entries of a big matrix product
Suppose I have a tall matrix x (say 10000 by 10), and a collection of indices {N1, N2, ..... Nk} where each Ni is a subset of {1...

11 months 前 | 1 个回答 | 0

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Fast matrix product where one matrix is sparse [Ed. and diagonal] and the other is a Kronecker product
Suppose I want to calculate something like A*(Kron(B,eye(n))), where A is a large diagonal matrix whose main diagonal is also sp...

2 years 前 | 1 个回答 | 1

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Quickly extract the diagonal blocks of matrix product
Suppose I have a tall n by r matrix X (n as large as 10^4 and r=4), and I also have partitions of 1:n by small subsets ({1,2},{3...

2 years 前 | 1 个回答 | 0

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