How to implement an ACO algorithm for vehicle routing?
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i need pre-written code to solve VRP using ACO or GA.
[Merged information from duplicate question]
anyone can help me with writing a code to implement ACO or Genetic Algorithm in solving VRP
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Réponses (3)
Walter Roberson
le 9 Mar 2012
Your existing question is still here and still active. I have merged your information from your newer phrasing.
Please do not open duplicate questions: it only confuses and frustrates people.
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Arlene Natividad
le 22 Jan 2018
hello i really need help. I need a source code to solve vrp using ant colony for my thesis. please help me. please
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Walter Roberson
le 24 Jan 2018
hafid oubouddi
le 9 Avr 2022
hello, how to find parameters or solve equations of a system using ACO
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Walter Roberson
le 10 Avr 2022
You create a fitness function -- a function that has a lower value if the model or system of equations is solved better. Then you pass that fitness function into your ACO code.
When you have a model, then it is common to create the fitness function using the strategy:
- use the passed-in trial values of the parameters to predict what the results would be at each configuration of independent variables
- subtract the known values at those locations
- square each individual result
- sum those squares
This is sometimes known as a "sum of squared errors" function. It is the square of the Euclidean distance between the predicted values and the known values; a perfect fit would give a sum of squared errors of zero.
When you have a system of equations:
- take the left sides of the equations minus the right side of the equations
- square those differences
- sum those squares
This sum of squared errors would mathematically be zero when each of the equations balanced. (In practice you can run into numeric difficulties.)
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