Opened 12 years ago
Closed 12 years ago
#10158 closed enhancement (fixed)
efficiency problem when constructing matrices from list of list
| Reported by: | ylchapuy | Owned by: | jason, was |
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| Priority: | major | Milestone: | sage-4.6.1 |
| Component: | linear algebra | Keywords: | |
| Cc: | SimonKing | Merged in: | sage-4.6.1.alpha0 |
| Authors: | Yann Laigle-Chapuy | Reviewers: | Robert Bradshaw |
| Report Upstream: | N/A | Work issues: | |
| Branch: | Commit: | ||
| Dependencies: | Stopgaps: |
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Description (last modified by )
this should be fast:
sage: M = matrix(ZZ, [[0] for i in range(10^6)])
see http://groups.google.com/group/sage-support/browse_thread/thread/2f50741b171eaa1a
Attachments (1)
Change History (8)
comment:1 Changed 12 years ago by
| Description: | modified (diff) |
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comment:2 Changed 12 years ago by
| Description: | modified (diff) |
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comment:3 Changed 12 years ago by
| Cc: | SimonKing added |
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Changed 12 years ago by
| Attachment: | trac10158-matrix_from_list_of_list.patch added |
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comment:4 Changed 12 years ago by
| Authors: | → Yann Laigle-Chapuy |
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| Description: | modified (diff) |
| Status: | new → needs_review |
comment:5 Changed 12 years ago by
| Status: | needs_review → positive_review |
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comment:6 Changed 12 years ago by
| Reviewers: | → Robert Bradshaw |
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comment:7 Changed 12 years ago by
| Merged in: | → sage-4.6.1.alpha0 |
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| Resolution: | → fixed |
| Status: | positive_review → closed |
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Easiest solution provided, even if we could probably do better (see the thread).