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Questions - set-cover

Minimal `set cover` solution in Clojure

I've been trying ways to distill (a lot of) database index suggestions into a set of indexes that are applicable to most databases. To do that it turns out I need to solve a pretty basic but NP comple...
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NielsK

recursion

clojure

np

set-cover

Votes: 0

Answers: 1

Latest Answer

Here's a Clojure version of the greedy set cover algorithm i.e. selects a set which covers the most uncovered elements at each iteration. Rather than use loop/recur to build the complete result, it la...
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Steffan Westcott

AttributeError: 'LpAffineExpression' object has no attribute 'solve', Error in Pullp

I'm trying to implement a problem a basis problem os Set covering with python, but pulp gives me all the time the error: AttributeError: 'LpAffineExpression' object has no attribute 'solve' This is wh...
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jopelines

python

pulp

set-cover

Votes: 0

Answers: 1

Latest Answer

You are overwriting the modelo variable when defining the objective, so it's no longer a pulp.LpProblem. Use modelo += lp.lpSum(x[j] for j in J) instead. Note the += instead of the =. Alternatively,...
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joni

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