#18742: interactive_simplex_method: Support several styles corresponding to
major
textbooks
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Reporter: mkoeppe | Owner:
Type: task | Status: needs_work
Priority: minor | Milestone: sage-6.8
Component: numerical | Resolution:
Keywords: beginner, lp, | Merged in:
teaching | Reviewers: Andrey Novoseltsev
Authors: Peijun Xiao, | Work issues:
Matthias Koeppe | Commit:
Report Upstream: N/A | 1a2845ffc2768bde19a9e7a29e3d9131aa79e278
Branch: | Stopgaps:
u/mkoeppe/interactive_simplex_method__support_several_styles_corresponding_to_major_textbooks|
Dependencies: |
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Changes (by novoselt):
* status: needs_review => needs_work
* reviewer: => Andrey Novoseltsev
Comment:
Hmmm, that's not quite what I thought was going to happen.
1. Are there use cases when it is convenient to work a lot with multiple
style problems? It seems to me that you probably like one or the other and
don't care about other styles at all. Then it would make sense to have a
single global style variable (in the module, of course, not in the global
user namespace) which the user can set once in the beginning of each
session and not worry about it again.
2. The naming "None" and "vanderbei" could be improved. How about using
proper capitalization string for authors, i.e. "Vanderbei" and something
more descriptive for the current style, say "UAlberta" since I am not bold
enough to claim it under my own name ;-) It may be convenient to also
support "default" which will equate to one of the named styles.
3. The way how style differences are documented makes it a bit hard to
follow and most definitely will be hard to expand in the future. How
about: have a single function (rather than exposed variable) that changes
the style or returns current one, whose docstring lists all possible
styles and instead of comparing them to each other has a list of
conventions for each (i.e. dictionaries are displayed like ..., default
objective variable is ..., default dual variables are ..., etc.) Then
adding another style means adding another block to this function without
altering others. Functions whose default behaviour depends on the style
can just point to that function for details instead of duplicating
descriptions.
--
Ticket URL: <http://trac.sagemath.org/ticket/18742#comment:9>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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