#10628: initialization of matrices from vectors or list of lists can be way
faster
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Reporter: mderickx | Owner: jason, was
Type: enhancement | Status: needs_work
Priority: major | Milestone:
Component: linear algebra | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author: Maarten Derickx, Simon King
Merged: | Dependencies:
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Comment(by SimonKing):
Replying to [comment:13 mderickx]:
> Cool, thanks for showing interest in this ticket. I will try to look at
your work if you have a updated patch witch passes the doctests.
I see what happened.
I test whether the length of x coincides with the number of entries of the
matrix. If it does, then it is assumed that it is a list of ring elements.
The error occurs if the matrix space has one row and one column. If the
input is, say, `[[0]]`, then the length of that list is one. Hence, with
my patch, it is directly forwarded to the init method of the matrix class
-- but it ''should'' send `[0]` to the init method.
Fixing it now, then repeating the timings...
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10628#comment:14>
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