#3436: random_matrix() with prescribed density buggy
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Reporter: rpw | Owner: was
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.3.1
Component: linear algebra | Keywords:
Work_issues: | Author: spancratz
Upstream: N/A | Reviewer:
Merged: |
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Comment(by craigcitro):
I mentioned this to Tom, but just in case no one gets to it: implementing
this for cyclotomic matrices should be pretty easy once you find out about
the `set_unsafe` method on dense cyclotomic matrices. You can use the same
generic code that loops over any other matrix, but use `set_unsafe` and
(as long as you're really not going outside the bounds of the matrix!)
it'll take care of setting the entry in the matrix correctly and quickly.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/3436#comment:9>
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