#13555: Doctests of random functions needs to be improved.
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Reporter: JoalHeagney
| Owner: mvngu
Type: defect
| Status: new
Priority: major
| Milestone: sage-5.5
Component: doctest
| Resolution:
Keywords: random, matrices, random_matrix, properties of random
objects, properties | Work issues:
Report Upstream: N/A
| Reviewers:
Authors:
| Merged in:
Dependencies:
| Stopgaps:
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Comment (by JoalHeagney):
This is some code I put together to check matrix values element by
element:
{{{
A = random_matrix(ZZ,5); A
def checkfunc(matrix, func):
for val in matrix.list():
if func(val) == True:
return True
return False
checkfunc(A, lambda x: x == 0)
A = random_matrix(ZZ,5,x=4,y=10)
checkfunc(A, lambda x: (x >= 4 & x < 10))
}}}
It's been a while since I was an efficient python programmer, so I'm sure
someone will show me a generator/list method which is a lot more
efficient.
I did checkfunc as a function because I was thinking about large matricies
and saving memory space (as well as returning on the first match to the
conditions). I'm not satisfied with the fact that checkfunc iterates over
a list rather than a generator.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13555#comment:4>
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