Thursday, October 20, 2011

graph search

An implementation of general graph search. The search strategy is determined by the definition on line 59, cost. The expression shown below produces an A* search. If instead one substitutes cost = sum . map dist . segments, the procedure becomes a uniform-cost search. Using length finds the path with fewest nodes, and simiarly dist [last ps, goal] produces a greedy best-first algorithm.

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