1 module InstanceGenerator where
5 import Data.Array.IArray
10 -- Expertise on each of the topics
11 type ReviewerInfo = Array Int Double
13 randomReviewerInfo = do
14 list <- sequence $ replicate numTopics $
15 withProb [(0.15, return 2), (0.4, return 1)] (return 0)
16 return $ listArray (0, numTopics-1) list
18 -- One topic or two different topics
19 data ProposalTopics = PTopic1 Int | PTopic2 Int Int
21 --type ProposalAuthors = Maybe Int
23 type ProposalInfo = (ProposalTopics, Wt)
25 randomProposalTopics = do
26 t1 <- mrandomR (0, numTopics-1)
27 withProb [(0.5, return $ PTopic1 t1)] (do
28 t2 <- filterRandomized (/= t1) $ mrandomR (0, numTopics-1)
29 return $ PTopic2 t1 t2
32 -- Add conflict of interest later.
34 randomProposalAuthors = do
35 withProb [(0.5, return [])] (do
36 a1 <- mrandomR (0, numRvrs-1)
37 withProb [(0.5, return [a1])] (do
38 a2 <- filterRandomized (/= a1) $ mrandomR (0, numRvrs-1)
44 randomProposalInfo = do
45 topics <- randomProposalTopics
46 diff <- mrandomR (3, 5)
47 return (topics, fromInteger diff)
49 expertnessToPref expertness = if expertness == 0 then 7
50 else if expertness == 1 then 5
53 randomInstance :: Int -> Int -> Randomized Instance
54 randomInstance numRvrs numProps = do
55 reviewerInfosList <- sequence $ replicate numRvrs $ randomReviewerInfo
56 -- reviewerProfs is an array of arrays.
57 -- A pair-indexed array might be better...
58 let reviewerInfos = listArray (0, numRvrs-1) reviewerInfosList :: Array Int ReviewerInfo
59 proposalInfosList <- sequence $ replicate numProps $ randomProposalInfo
60 let proposalInfos = listArray (0, numProps-1) proposalInfosList :: Array Int ProposalInfo
61 let loadA = funcArray (0, numRvrs-1) $ const 1
62 let prefA = funcArray ((0, 0), (numRvrs-1, numProps-1)) (\(i,j) ->
64 ii = reviewerInfos ! i
65 jj = proposalInfos ! j
66 topicPref = case fst jj of
67 PTopic1 t1 -> expertnessToPref (ii ! t1)
68 PTopic2 t1 t2 -> (expertnessToPref (ii ! t1) + expertnessToPref (ii ! t2)) / 2
69 in topicPref * snd jj - 4)
70 return $ Instance numRvrs numProps loadA prefA