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Zhuoran Han


Last seen: 1 year 前 |  自 2021 起处于活动状态

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Why these two similar operations (a sparse matrix w/o transpose times a vector) take different time to finish?
n = 1e5; a = sprand(n,n,5/n); v = rand(n,1); tic; for i = 1:1e3, b = a*v; end; toc tic; for i = 1:1e3, c = a'*v; end; toc I...

2 years 前 | 2 个回答 | 0

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deleting row and column from very large Sparse matrix efficiently
This is an easy way to deal with boundary conditions in stiffness matrices, have you tried permutation? Suppose your original m...

3 years 前 | 0