Questions tagged [neat]

For questions related to the neuroevolution technique called NeuroEvolution of Augmenting Topologies (NEAT), introduced in the paper "Evolving Neural Networks through Augmenting Topologies" (2002) by Kenneth O. Stanley and Risto Miikkulainen.

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3
votes
1answer
294 views

Does training happen during NEAT?

When one uses NEAT to evolve the best fitting network for a task, does training take place in each epoch as well? If I understand correctly, training is the adjustment of the weights of the neural ...
0
votes
1answer
225 views

How to evaluate output of unlayered NN?

I used to work with 'traditional' layered neural network and I evaluated the output given certain inputs by processing layer-by-layer. With NEAT, a neural network may assume any topology and they are ...
2
votes
1answer
798 views

How are connection weights “perturbed”?

I am reading through the NEAT paper here. On page 14 of the PDF, there is this quote about mutation: There was an 80% chance of a genome having its connection weights mutated, in which case each ...
3
votes
1answer
98 views

How do I design a fitness function that weighs the importance of eating food?

Summary: I am teaching bots to pick food on a playing field. Some food is poisonous and some is good. Food Details: Poisonous food subtracts score points and good food adds. Food points vary based on ...
3
votes
2answers
1k views

Can mutation enable a disabled connection?

In the add node mutation, the connection between two chosen nodes (e.g. A and B) is first disabled and then a new node is created between A and B with their respective two connections. I guess that ...
5
votes
2answers
956 views

Does NEAT require only connection genes to be marked with a global innovation number?

Does NEAT require only connection genes to be marked with a global innovation number? From the NEAT paper Whenever a new gene appears (through structural mutation), a global innovation number is ...
2
votes
2answers
469 views

How does adjusted fitness penalize large species in NEAT?

I'm learning about NEAT from the paper Evolving Neural Networks through Augmenting Topologies. I'm having trouble understanding how adjusted fitness penalizes large species and prevents them from ...
14
votes
4answers
13k views

How can I design and train a neural network to play a card game (similar to Magic: The Gathering)?

Introduction I am currently writing an engine to play a card game, as there is no engine yet for this particular game. About the game The game is similar to Magic: The Gathering. There is a commander, ...
4
votes
1answer
144 views

Problem with fitness calculation in NEAT

I am working on a project in which a drone is up to learn to fly. I am using NEAT. For the first experiment I want it to learn how to hover inside a 3x3x3 meters box. My input is 6 sensors for each ...
10
votes
6answers
626 views

Open-source tools or libraries to experiment with neural networks and evolutionary algorithms [closed]

I'd like to do some experimenting with neural net evolution (NEAT). I wrote some GA and neural net code in C++ back in the 90s just to play around with, but the DIY approach proved to be labor-...
2
votes
1answer
98 views

What to do with duplicate Innovations in a genome?

I´m currently implementing NEAT. What should I do when in a mutation the same Innovation occurs which has already happened to that genome? Should I simply ignore it? If not what do I do with it in ...
6
votes
1answer
373 views

How does mating take place in NEAT?

In the Evolving Neural Networks through Augmenting Topologies (NEAT) paper it says (p. 110): The entire population is then replaced by the offspring of the remaining organisms in each species. ...
5
votes
1answer
539 views

What happens if 2 genes have the same connection but a different innovation number?

I have read the Evolving Neural Networks through Augmenting Topologies (NEAT) paper, but some doubts are still bugging me, so I have two questions. When do mutations occur? Between which nodes? When ...
5
votes
1answer
817 views

When do mutations in NEAT occur?

I read through the Evolving Neural Networks through Augmenting Topologies (NEAT) paper. I understand the algorithm now, but one thing is still unclear to me. When does the mutation occur and how ...
2
votes
2answers
576 views

How do you choose the number of neurons, synapses, and hidden layers of an ANN (in NEAT)?

I want to make a Connect 4 AI using machine learning, but I'm a complete beginner to the topic. From what I've seen, an ANN is a way to go. Some phrases I've heard are "neuroevolution" and the acronym ...

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