bandits | Armed Bandit algorithms applied to the MovieLens 20M dataset | Recommender System library

 by   jldbc Python Version: Current License: MIT

kandi X-RAY | bandits Summary

kandi X-RAY | bandits Summary

bandits is a Python library typically used in Artificial Intelligence, Recommender System applications. bandits has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. However bandits build file is not available. You can download it from GitHub.

Implementations of UCB1, Bayesian UCB, Epsilon Greedy, and EXP3 bandit algorithms on the Movielens-20m dataset. Algorithms are evaluated offline using replay.
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            kandi-support Support

              bandits has a low active ecosystem.
              It has 24 star(s) with 12 fork(s). There are 1 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              bandits has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of bandits is current.

            kandi-Quality Quality

              bandits has no bugs reported.

            kandi-Security Security

              bandits has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              bandits is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              bandits releases are not available. You will need to build from source code and install.
              bandits has no build file. You will be need to create the build yourself to build the component from source.
              Installation instructions are not available. Examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed bandits and discovered the below as its top functions. This is intended to give you an instant insight into bandits implemented functionality, and help decide if they suit your requirements.
            • Evaluate Exp3 policy
            • Score a dataframe
            • Calculates weight based on action distribution
            • Draw a random arm
            • Compute the distance between weights
            • Return a list of movie ratings
            • Prepare movie logs
            • Read movie data
            • Returns a list of movie ratings
            • Prepare the movie data for 1m
            • Uses uBC1 policy
            • Generate a random movie based on an epsilon distribution
            • Score a time series
            Get all kandi verified functions for this library.

            bandits Key Features

            No Key Features are available at this moment for bandits.

            bandits Examples and Code Snippets

            No Code Snippets are available at this moment for bandits.

            Community Discussions

            QUESTION

            What is Vowpal Wabbit’s default learner for CMAB Framework?
            Asked 2020-Dec-03 at 16:29

            I’m checking Vowpal Wabbit’s documentation for how it’s actually learning. Traditional Contextual Bandits learn by having F(context, action) = Reward, find action that maximizes Reward, and returns action as recommendation. The “F” is any model; linear, neural net, xgb, etc... that is learned through batch processing. I.E. collect 100 contexts, 100 actions, 100 rewards, train ML model, then do it again.

            Now, on VW it says it reduces “all contextual bandit problems to cost-sensitive multiclass classification problems.” Ok, read up on that but there still needs to be some function F to minimize this problem doesn’t there?

            I’ve thoroughly read the documentation and either:

            1. Missed what the default learner is for batch processing or,
            2. Don’t understand how VW is actually learning in this cost-sensitive framework?

            I’ve even scoured the vw.learn() method inside pyvwlib. Thanks for the help!

            ...

            ANSWER

            Answered 2020-Dec-03 at 16:29

            Missed what the default learner is for batch processing or,

            The default learner in VW is SGD on a linear representation, but this can be modified using command line arguments.

            Don’t understand how VW is actually learning in this cost-sensitive framework?

            In contextual bandit learning, the reward associated with the taken action is presented for learning. VW in ips mode converts this into a reward for each action by putting zeros at the actions not taken and importance-weighting the reward for the action taken. Having imputed the missing data, it then treats the problem as a supervised learning problem.

            Source https://stackoverflow.com/questions/64940685

            QUESTION

            Creating array of objects; Best way to do it?
            Asked 2020-Sep-29 at 17:33

            Good afternoon.

            I am attempting to make a small game inspired by Among Us. The game will feature two bandits if there are 7 or more players, and one bandit if the player count is 6 or less.

            I have run into a problem though, so I am attempting to create multiple constructors, here is how I imagine the layout to be.

            Console -> Input names separated by comma -> String[] names -> newPlayer Constructor

            The newPlayer constructor will then determine the number of players, and sort them into their respective constructor, using Math.random to determine the bandits.

            Bandit route newPlayer Constructor -> Bandit Constructor -> Player Constructor

            Cowboy route newPlayer Constructor -> Bandit Constructor -> Player Constructor

            The problem is that after the data is given to the Player constructor, I'd like to create an array of type Player[], so I can easily access the data within, without creating invidual Player variables, and then making this array accessible to the rest of the classes within the package. I'm looking for the most concise way to do it.

            Although I feel like this may not require code for context, I'll provide it in case it helps answer my question.

            Bandit Class

            ...

            ANSWER

            Answered 2020-Sep-29 at 17:33

            "I'd like the array of Players to be created within the tester class": I would suggest using List interface instead of native java array (much easier to use). Something like this: List players = new ArrayList<>() and you can use players.add( /*player*/ ) and players.get(/*idx*/) to add and retrieve.

            "accessible to the rest of the classes within the package": a default class property is accessible for classes within the same package. Like this: List players; or already initialized: List players = new ArrayList<>();. Don't use any modifier like private, public or protected and it will mean this property is "default" access (within same package). See: https://docs.oracle.com/javase/tutorial/java/javaOO/accesscontrol.html

            Source https://stackoverflow.com/questions/64124214

            QUESTION

            Unity C#, Line of code not executing properly
            Asked 2020-Sep-19 at 08:26

            In my game, the "boar" line of code will execute if the object hits a boar, but the "bandit" line of script will not execute if I hit a bandit.

            Both of the game objects have the "enemy" tag.

            If I move the bandit line of code to the top, that line will now work when colliding with a bandit but the boar code below it will not when collided with a boar.

            ...

            ANSWER

            Answered 2020-Sep-18 at 22:30

            The reason why it doesn't work is because your program looks and says "yes i hit an object with the tag enemy" checks the next line trys to fetch the bandit script or whatever one is on top then if lets say bandit script is first it will come up empty and will never make it to the boar script it will only ever work with whichever is on top if you have two objects with the same tag and different scripts

            Give each enemy a different tag. Then write something like --

            Source https://stackoverflow.com/questions/63962832

            QUESTION

            How do I not have my table shift down when text lengths change? (Keep the table fixed in one position)
            Asked 2020-May-02 at 08:29

            I have a simple table set up with a generator above it that varies in text lengths. Every so often I get an extra line and that shifts my table down. Is there any way I could keep my table fixed in one position?

            Please ignore the Javascript and only look at CSS and HTML, specifically the sections related to ButtonSection and the Table. Thanks

            ...

            ANSWER

            Answered 2020-May-02 at 08:29

            You could try and wrap the text that varies in length in a div element and fix it's height, so that the longest text doesn't move the table.

            In your html:

            Source https://stackoverflow.com/questions/61551807

            QUESTION

            Plot linear plot and log plot next to each other in Python. Similar to mfrow=c(2,1) in R
            Asked 2020-Apr-01 at 06:29

            I am trying to plot two plots next to each other in python, one a linear result of the experiment and one a logarithmic transformation. The goal would be to place the plots next to each other similar to par(mfrow=c(1,2)) in R .

            ...

            ANSWER

            Answered 2020-Apr-01 at 06:29

            As @JohanC pointed out in the comments, you are confusing the syntax of plt.subplots() and plt.subplot(). The line

            Source https://stackoverflow.com/questions/60958362

            QUESTION

            Using simple averaging for reinforcment learning
            Asked 2019-Sep-20 at 21:33

            I am currently reading Reinforcement Learning: An Introduction (RL:AI) and try to reproduce the first example with an n-armed bandit and simple reward averaging.

            Averaging

            ...

            ANSWER

            Answered 2019-Sep-20 at 20:23

            In the formula for the update rule

            Source https://stackoverflow.com/questions/58033188

            QUESTION

            Adding Laika auto-numbering to top-level directory titles
            Asked 2019-Sep-05 at 21:45

            I have the directory.conf:

            ...

            ANSWER

            Answered 2019-Sep-05 at 21:45

            To add numbering from the second level down you must also add the

            Source https://stackoverflow.com/questions/57348059

            QUESTION

            Python - Tkinter how to close window after button is pressed?
            Asked 2019-Mar-23 at 19:06

            So there is a first window for the user to log into. Once the user has logged in they can start the game by clicking the "continue" button. The command of this button is set to the function con which should close the window using the window.destroy() function however whenever I try to click it I always receive an error stating "window is not defined"

            ...

            ANSWER

            Answered 2019-Mar-23 at 19:06

            this will work with the login button,,,, i sent the window with the login function

            here i added the window to the function

            Source https://stackoverflow.com/questions/55317187

            QUESTION

            Unmarshalling json in golang
            Asked 2019-Jan-05 at 16:27

            golang beginner here.

            I want to unmarshall some JSON shown here:

            ...

            ANSWER

            Answered 2019-Jan-05 at 05:05

            For marshalling and unmarshalling, fields must be exported.

            Source https://stackoverflow.com/questions/54049017

            QUESTION

            Can nested functions use variables with values set in other functions within the parent function? (Javascript)
            Asked 2019-Jan-02 at 15:13

            I'm a total beginner trying to write code to roll on a series of branching d100 tables (the results of the first table determine which table is rolled on next, and so on).

            I've gotten it to work by writing it all as one function, but because I'd like to loop a particular table several times while still referencing the results of the previous table, I'd like to do it as a series of nested functions.

            The issue I'm running into is that if I nest the same code that worked as one function into a function within the parent function, EDIT: yearResults is now being written to the HTML but monthResults is coming back as undefined

            Is there a way I can make this work? Is this a stupid way to go about trying to achieve this? Thank you for your help.

            ...

            ANSWER

            Answered 2018-Dec-31 at 21:49

            Your conditions are wrong:

            Source https://stackoverflow.com/questions/53991491

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

            Vulnerabilities

            No vulnerabilities reported

            Install bandits

            You can download it from GitHub.
            You can use bandits 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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