distance_to_position_test, a MATLAB code which calls distance_to_position(), which estimates the positions of cities given a city-to-city distance table.
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distance_to_position, a MATLAB code which estimates the positions of cities based on a city-to-city distance table.
CHAIN_LETTER is a problem involving perceived distances between pairs of 11 chain letters.
GRID04 is a problem involving distances between pairs of 4 points.