Genetic-Algorithm | computer science and operations research | Machine Learning library

 by   jatinmandav Python Version: Current License: No License

kandi X-RAY | Genetic-Algorithm Summary

kandi X-RAY | Genetic-Algorithm Summary

Genetic-Algorithm is a Python library typically used in Artificial Intelligence, Machine Learning applications. Genetic-Algorithm has no bugs, it has no vulnerabilities and it has low support. However Genetic-Algorithm build file is not available. You can download it from GitHub.

In computer science and operations research, a genetic algorithm is a metaheuristic inspired by process of natural selection that belongs to the larger class of evolutionary algorithms.
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              Genetic-Algorithm has a low active ecosystem.
              It has 7 star(s) with 3 fork(s). There are 1 watchers for this library.
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              It had no major release in the last 6 months.
              Genetic-Algorithm has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of Genetic-Algorithm is current.

            kandi-Quality Quality

              Genetic-Algorithm has no bugs reported.

            kandi-Security Security

              Genetic-Algorithm has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              Genetic-Algorithm does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
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              Without a license, all rights are reserved, and you cannot use the library in your applications.

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              Genetic-Algorithm releases are not available. You will need to build from source code and install.
              Genetic-Algorithm has no build file. You will be need to create the build yourself to build the component from source.

            Top functions reviewed by kandi - BETA

            kandi has reviewed Genetic-Algorithm and discovered the below as its top functions. This is intended to give you an instant insight into Genetic-Algorithm implemented functionality, and help decide if they suit your requirements.
            • Main loop
            • Display info about the population
            • Check if the population is better
            • Visualize obstacles
            • Calculate fitness for population
            • Draw cities
            • Calculate fitness
            • Adds information about the genetic algorithm
            • Generate a population of the population
            • Finds the best population
            • Perform crossover between two DNA sequences
            • Generate a random character
            • Generate a random character
            • Draw a list of cities
            • Creates a new image
            • Add information about the genetic algorithm
            • Repeatedly replicate the population
            • Find the most recent population
            • Calculate fitness
            • Check if the population is valid
            Get all kandi verified functions for this library.

            Genetic-Algorithm Key Features

            No Key Features are available at this moment for Genetic-Algorithm.

            Genetic-Algorithm Examples and Code Snippets

            Run genetic algorithm .
            pythondot img1Lines of Code : 40dot img1License : Permissive (MIT License)
            copy iconCopy
            def genetic_algorithm(cities, popsize, elite_size, mutation_rate, generations, plot=True, prn=True):
                global route
                global progress
            
                population = initial_population(popsize=popsize, cities=cities)
                if plot:
                    animate_progress()
                 

            Community Discussions

            QUESTION

            Binary Classification NN Model Weights not being Trained in PyGAD
            Asked 2021-May-01 at 18:28

            Here is the code I am writing: Fake News Detection Google Colab Notebook

            The dataset I use: fake_or_real_news

            The glove embedding layer: glove.twitter.27B.200d

            I've been trying out PyGAD, a python library for genetic algorithm used on machine learning.

            What I want to achieve is fake news detection. What I have done is preprocess the articles, and transform them into vectors. I use Glove as the embedding layer in the NN. I've tried to train using the NN model without GA, and it worked fine. Then I applied the NN to PyGAD GA following the tutorial: How To Train Keras Models Using the Genetic Algorithm with PyGAD, the process seemed to be running fine, but the fitness score wasn't going up at all even after 200 generations. I've tried to change the mutation method and some other hyper parameters, but it doesn't seem to change the outcome. What have I done wrong in the process of building the PyGAD GA model? Most of the PyGAD model settings are the same as the examples in the tutorial above.

            To specify the problem I am encountering: Below is the main PyGAD code I am using:

            Training input(X_train):

            ...

            ANSWER

            Answered 2021-May-01 at 18:28

            Your model has large number of parameters (>6.1M). Only the embedding layer has 6M for itself. For a number of parameters like that, the genetic algorithm is expected to take much time for training the model. It does not mean you made a problem. I already tried working with a huge CNN before and there was a progress but very small.

            According to the capabilities of your machine, you should increase the number of solutions as much as possible. Also use as many generation as possible.

            Thanks for using PyGAD!

            Source https://stackoverflow.com/questions/67276696

            QUESTION

            Creating a genetic algorithm
            Asked 2021-Feb-19 at 05:50

            Im trying to recreate this code: https://github.com/Code-Bullet/Smart-Dots-Genetic-Algorithm-Tutorial/tree/master/BestTutorialEver , but in python, and it doesn't work, it keeps mutating the best dot and every generation starts with less dots. Here is the code (i use pygame for graphics):

            Brain class:

            ...

            ANSWER

            Answered 2021-Feb-19 at 05:39

            I did not try the project you mentioned. You may try PyGAD, a Python 3 library for building the genetic algorithm and training machine learning algorithms. It is open-source where you can find the code at GitHub.

            It is simple to use which allows you to control the crossover, mutation, and parent selection operators in an easy way. You can also control many parameters of the genetic algorithm using PyGAD.

            PyGAD also works with a user-defined fitness function so you can adapt it to a wide-range of problems.

            After installing PyGAD (pip install pygad), here is a simple example to get started that tries to find the best values for W1, W2, and W3 that satisfies the following equation:

            44 = 4xW_1 - 2xW_2 + 1.2xW_3

            Source https://stackoverflow.com/questions/65863290

            QUESTION

            Python: how to implement crossover of two integers?
            Asked 2020-Mar-15 at 18:04

            I'm experimenting with a genetic search algorithm and after building the initial population at random, and then selecting the top two fittest entries, I need to 'mate' them (with some random mutation) to create 64 'children'. The crossover part, explained here:

            https://towardsdatascience.com/introduction-to-genetic-algorithms-including-example-code-e396e98d8bf3

            seems easy to follow, but I can't seem to figure out how to implement it in Python. How can I implement this crossover of two integers?

            ...

            ANSWER

            Answered 2020-Mar-14 at 22:53

            Here is a function called crossover that takes two parents and a crossover point. The parents should be lists of integers of the same length. The crossover point is the point before which genes get exchanged, as defined in the article that you linked to. It returns the two offspring of the parents.

            Source https://stackoverflow.com/questions/60687712

            QUESTION

            GA stepGA - Index exceeds matrix dimensions
            Asked 2019-Jul-10 at 10:51

            I'm writing Custom GA functions in MATLAB for mixed integer problem. More about my problem here and here.

            After Roulette Wheel selection is over, Matlab breaks with error:

            ...

            ANSWER

            Answered 2019-Jul-10 at 10:51
            • RouletteWheelSelection doesn't return parents with 2 individuals
            • Assuming the population contains 10 individuals
            • During RouletteWheelSelection you'll be asked to choose nParents out of the 10, 5 for example

            Obviously nParents should not exceed PopulationSize

            You have set nParents = 16while PopulationSize = 10

            • The correct word will be nIndividuals instead of nParents
            • expectation means probability, a value comprised between 0 and 1, also called relative fitness

            Source https://stackoverflow.com/questions/56957779

            QUESTION

            Why double is NaN after toggling bits?
            Asked 2019-Jun-16 at 18:38

            I'm writing an genetic algorithm for finding coefficients having given X, Y points. The principle of operation is described on this page - https://towardsdatascience.com/introduction-to-genetic-algorithms-including-example-code-e396e98d8bf3

            I have problem, because sometimes after mutation or crossover my double value is NaN.

            I've tried do this using byte[] and BitArray, but in both approaches I have the same result.

            Converting double <-> BitArray:

            ...

            ANSWER

            Answered 2019-Jun-16 at 18:15

            It's because you're using random bytes to generate IEEE-754 numbers. You should not do that because IEEE-754 defines the structure for these numbers and using random byte input won't give you random numbers because some bits represent things like the is Not-a-Number field, and NaN values are "viral" and invalidate other calculations.

            To generate random Double numbers you should use System.Random.NextDouble().

            Source https://stackoverflow.com/questions/56621405

            QUESTION

            Genetic Algorithm - Parent Selection vs. Crossover Probability
            Asked 2018-Dec-28 at 16:41

            I read the tutorial on TutorialsPoint and this question and answer on StackOverflow. However, I still do not understand the meaning of Crossover Probability in the Parent Selection and Crossover process of a genetic algorithm.

            Say I have a population of size 100 and the crossover probability is 0.9. What does it mean? Do I:

            • select precisely 10 parents (since 90 % of offsprings shall be made by crossover), or
            • run a RNG 100 times and for each time the 0.9 probability fails, I select a parent?

            Then, the parents are somehow crossed over and some individuals mutate. Does the population need to have exactly 100 members at this point, or there is an additional selection of which individuals make it to the next generation?

            ...

            ANSWER

            Answered 2018-Dec-28 at 16:28

            Its not exactly 10 parents, on average 10 parents. Following is the pseudo code, which I follows.

            Source https://stackoverflow.com/questions/53961193

            QUESTION

            how to add max(or min) fitness halting condition to multiprocessing deap python genetic algorithm
            Asked 2018-Dec-20 at 00:56

            this question is a follow-on to answer of this question about python deap genetic algorithm library: How to add elimination mechanism in Python genetic algorithm based on DEAP

            using reference code from deap github: https://github.com/DEAP/deap/blob/master/examples/ga/onemax.py

            line 112 while max(fits) < 100 and g < 1000: #from onemax.py

            on the deap github example 'onemax_mp.py': https://github.com/DEAP/deap/blob/master/examples/ga/onemax_mp.py

            how do i add a max(or min) condition similar to max(fits) < 100 in the onemax_mp.py?

            if i do add this condition is this condition applied to each process in the entire multi-process pool of processes? if one process meets the end condition are the other processes halted?
            right now it seems that i can only control the number of generations:

            https://github.com/DEAP/deap/blob/master/examples/ga/onemax_mp.py

            line 40

            algorithms.eaSimple(pop, toolbox, cxpb=0.5, mutpb=0.2, ngen=40, stats=stats, halloffame=hof) #ngen=40 means calculate 40 generations

            i am new to stackoverflow, please let me know if i need to edit this question to fit forum rules

            ...

            ANSWER

            Answered 2018-Dec-20 at 00:56

            So, the line you're looking at is the termination condition. The evolution stops when an individual with fitness greater than 100 is found or after 1000 generations. I've done a lot of work with MOEAs, but I'm not too familiar with DEAP. That disclaimer aside, it looks like it's not evolving separate populations, just doing parallelized evaluation. So there's only one population. From the docs, it looks like you could take onemax.py and slot in a multiprocessing pool by doing this:

            Source https://stackoverflow.com/questions/53859991

            QUESTION

            python array notation shorthand :"k%parents.shape[0]" mean?
            Asked 2018-Oct-29 at 09:09

            I came across this notation today as going through this tutorial here:https://towardsdatascience.com/genetic-algorithm-implementation-in-python-5ab67bb124a6

            ...

            ANSWER

            Answered 2018-Oct-29 at 08:57

            % is a operator in python, i-e Modulus operator - it gives remainder of the division of left operand by the right

            Source https://stackoverflow.com/questions/53041810

            QUESTION

            Python - Problem involving multiplication between 'int' and 'type'
            Asked 2018-Oct-19 at 17:22

            I am trying to make work a piece of code in Python, composed of four modules.

            When running I get the following error in the module optimizer_Neuroevolution: "line 149, in evolve retain_length = int(len(graded)*self.retain) TypeError: unsupported operand type(s) for *: 'int' and 'type'

            The modules are as follow:

            First module main_Neuroevolution:

            ...

            ANSWER

            Answered 2018-Oct-19 at 17:11

            QUESTION

            Optimize Input Vector to achieve optimal results
            Asked 2018-Sep-27 at 22:35

            I couldn't figure out the following problem: if I may, I'd like to give you right away an example
            Imagine, you work with marketing data and you came up with a good regression model, predicting the "reach" of a certain campaign. All fine and dandy. Data Scientist Job done.
            But wait. We can do more.
            My question to you is:
            Assuming that we have a good model, how can we optimize the input vector ( = marketing campaign) to get the best possible "reach" ( = predictor / goal to optimize)?
            I was googling like crazy, but couldn't find any good approach (I am not talking about any hypterparameter optimization). The best approach I found so far is a genetic algorithm... example here and here
            Or - a brute force approach - calculate an enormous grid with tons of possible input vectors and then check, which one is the best (straight forward) - but that would be computational expensive.

            I would love to hear your opinion on this. Any advice on which topics I should check out?

            ...

            ANSWER

            Answered 2018-Sep-27 at 22:35

            A very long comment:

            Genetic algorithms can be nested. Put your genetic solution finder into a fitness function. Give it to a parent genetic algorithm. Have them search results by "optimizing input vector" from outer GA and "optimizing goal" from inner GA.

            You can even add a third layer of GA, to test the construction parameters of middle layer GA because we may not know what kind of search space we need. If we knew it, then we wouldn't need to optimize that vector.

            You can even decrease dimensions of problem per GA this way.

            Source https://stackoverflow.com/questions/52545116

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install Genetic-Algorithm

            You can download it from GitHub.
            You can use Genetic-Algorithm like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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