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<!doctype html>
<!-- Copyright 2016 Google Inc. All Rights Reserved.
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<html>
<head lang="en">
<link rel="icon" type="image/png" href="favicon.png">
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<meta name="keywords" content="neural networks,machine learning,javascript">
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<meta property="og:title" content="Tensorflow — Neural Network Playground"/>
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<meta name="author" content="Daniel Smilkov and Shan Carter">
<title>A Neural Network Playground</title>
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<body>
<!-- GitHub link -->
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<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 60.5 60.5" width="60" height="60">
<polygon class="bg" points="60.5,60.5 0,0 60.5,0 "/>
<path class="icon" d="M43.1,5.8c-6.6,0-12,5.4-12,12c0,5.3,3.4,9.8,8.2,11.4c0.6,0.1,0.8-0.3,0.8-0.6c0-0.3,0-1,0-2c-3.3,0.7-4-1.6-4-1.6c-0.5-1.4-1.3-1.8-1.3-1.8c-1.1-0.7,0.1-0.7,0.1-0.7c1.2,0.1,1.8,1.2,1.8,1.2c1.1,1.8,2.8,1.3,3.5,1c0.1-0.8,0.4-1.3,0.8-1.6c-2.7-0.3-5.5-1.3-5.5-5.9c0-1.3,0.5-2.4,1.2-3.2c-0.1-0.3-0.5-1.5,0.1-3.2c0,0,1-0.3,3.3,1.2c1-0.3,2-0.4,3-0.4c1,0,2,0.1,3,0.4c2.3-1.6,3.3-1.2,3.3-1.2c0.7,1.7,0.2,2.9,0.1,3.2c0.8,0.8,1.2,1.9,1.2,3.2c0,4.6-2.8,5.6-5.5,5.9c0.4,0.4,0.8,1.1,0.8,2.2c0,1.6,0,2.9,0,3.3c0,0.3,0.2,0.7,0.8,0.6c4.8-1.6,8.2-6.1,8.2-11.4C55.1,11.2,49.7,5.8,43.1,5.8z"/>
</svg>
</a>
<!-- Header -->
<header>
<h1 class="l--page">Tinker With a <b>Neural Network</b> <span class="optional">Right Here </span>in Your Browser.<br>Don’t Worry, You Can’t Break It. We Promise.</h1>
</header>
<!-- Top Controls -->
<div id="top-controls">
<div class="container l--page">
<div class="timeline-controls">
<button class="mdl-button mdl-js-button mdl-button--icon ui-resetButton" id="reset-button" title="Reset the network">
<i class="material-icons">replay</i>
</button>
<button class="mdl-button mdl-js-button mdl-button--fab mdl-button--colored ui-playButton" id="play-pause-button" title="Run/Pause">
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</button>
<button class="mdl-button mdl-js-button mdl-button--icon ui-stepButton" id="next-step-button" title="Step">
<i class="material-icons">skip_next</i>
</button>
</div>
<div class="control">
<span class="label">Epoch</span>
<span class="value" id="iter-number"></span>
</div>
<div class="control ui-learningRate">
<label for="learningRate">Learning rate</label>
<div class="select">
<select id="learningRate">
<option value="0.00001">0.00001</option>
<option value="0.0001">0.0001</option>
<option value="0.001">0.001</option>
<option value="0.003">0.003</option>
<option value="0.01">0.01</option>
<option value="0.03">0.03</option>
<option value="0.1">0.1</option>
<option value="0.3">0.3</option>
<option value="1">1</option>
<option value="3">3</option>
<option value="10">10</option>
</select>
</div>
</div>
<div class="control ui-activation">
<label for="activations">Activation</label>
<div class="select">
<select id="activations">
<option value="relu">ReLU</option>
<option value="tanh">Tanh</option>
<option value="sigmoid">Sigmoid</option>
<option value="linear">Linear</option>
</select>
</div>
</div>
<div class="control ui-regularization">
<label for="regularizations">Regularization</label>
<div class="select">
<select id="regularizations">
<option value="none">None</option>
<option value="L1">L1</option>
<option value="L2">L2</option>
</select>
</div>
</div>
<div class="control ui-regularizationRate">
<label for="regularRate">Regularization rate</label>
<div class="select">
<select id="regularRate">
<option value="0">0</option>
<option value="0.001">0.001</option>
<option value="0.003">0.003</option>
<option value="0.01">0.01</option>
<option value="0.03">0.03</option>
<option value="0.1">0.1</option>
<option value="0.3">0.3</option>
<option value="1">1</option>
<option value="3">3</option>
<option value="10">10</option>
</select>
</div>
</div>
<div class="control ui-problem">
<label for="problem">Problem type</label>
<div class="select">
<select id="problem">
<option value="classification">Classification</option>
<option value="regression">Regression</option>
</select>
</div>
</div>
</div>
</div>
<!-- Main Part -->
<div id="main-part" class="l--page">
<!-- Data Column-->
<div class="column data">
<h4>
<span>Data</span>
</h4>
<div class="ui-dataset">
<p>Which dataset do you want to use?</p>
<div class="dataset-list">
<div class="dataset" title="Circle">
<canvas class="data-thumbnail" data-dataset="circle"></canvas>
</div>
<div class="dataset" title="Exclusive or">
<canvas class="data-thumbnail" data-dataset="xor"></canvas>
</div>
<div class="dataset" title="Gaussian">
<canvas class="data-thumbnail" data-dataset="gauss"></canvas>
</div>
<div class="dataset" title="Spiral">
<canvas class="data-thumbnail" data-dataset="spiral"></canvas>
</div>
<div class="dataset" title="Plane">
<canvas class="data-thumbnail" data-regDataset="reg-plane"></canvas>
</div>
<div class="dataset" title="Multi gaussian">
<canvas class="data-thumbnail" data-regDataset="reg-gauss"></canvas>
</div>
</div>
</div>
<div>
<div class="ui-percTrainData">
<label for="percTrainData">Ratio of training to test data: <span class="value">XX</span>%</label>
<p class="slider">
<input class="mdl-slider mdl-js-slider" type="range" id="percTrainData" min="10" max="90" step="10">
</p>
</div>
<div class="ui-noise">
<label for="noise">Noise: <span class="value">XX</span></label>
<p class="slider">
<input class="mdl-slider mdl-js-slider" type="range" id="noise" min="0" max="50" step="5">
</p>
</div>
<div class="ui-batchSize">
<label for="batchSize">Batch size: <span class="value">XX</span></label>
<p class="slider">
<input class="mdl-slider mdl-js-slider" type="range" id="batchSize" min="1" max="30" step="1">
</p>
</div>
<button class="basic-button" id="data-regen-button" title="Regenerate data">
Regenerate
</button>
</div>
</div>
<!-- Features Column -->
<div class="column features">
<h4>Features</h4>
<p>Which properties do you want to feed in?</p>
<div id="network">
<svg id="svg" width="510" height="450">
<defs>
<marker id="markerArrow" markerWidth="7" markerHeight="13" refX="1" refY="6" orient="auto" markerUnits="userSpaceOnUse">
<path d="M2,11 L7,6 L2,2" />
</marker>
</defs>
</svg>
<!-- Hover card -->
<div id="hovercard">
<div style="font-size:10px">Click anywhere to edit.</div>
<div><span class="type">Weight/Bias</span> is <span class="value">0.2</span><span><input type="number"/></span>.</div>
</div>
<div class="callout thumbnail">
<svg viewBox="0 0 30 30">
<defs>
<marker id="arrow" markerWidth="5" markerHeight="5" refx="5" refy="2.5" orient="auto" markerUnits="userSpaceOnUse">
<path d="M0,0 L5,2.5 L0,5 z"/>
</marker>
</defs>
<path d="M12,30C5,20 2,15 12,0" marker-end="url(#arrow)">
</svg>
<div class="label">
This is the output from one <b>neuron</b>. Hover to see it larger.
</div>
</div>
<div class="callout weights">
<svg viewBox="0 0 30 30">
<defs>
<marker id="arrow" markerWidth="5" markerHeight="5" refx="5" refy="2.5" orient="auto" markerUnits="userSpaceOnUse">
<path d="M0,0 L5,2.5 L0,5 z"/>
</marker>
</defs>
<path d="M12,30C5,20 2,15 12,0" marker-end="url(#arrow)">
</svg>
<div class="label">
The outputs are mixed with varying <b>weights</b>, shown by the thickness of the lines.
</div>
</div>
</div>
</div>
<!-- Hidden Layers Column -->
<div class="column hidden-layers">
<h4>
<div class="ui-numHiddenLayers">
<button id="add-layers" class="mdl-button mdl-js-button mdl-button--icon">
<i class="material-icons">add</i>
</button>
<button id="remove-layers" class="mdl-button mdl-js-button mdl-button--icon">
<i class="material-icons">remove</i>
</button>
</div>
<span id="num-layers"></span>
<span id="layers-label"></span>
</h4>
<div class="bracket"></div>
</div>
<!-- Output Column -->
<div class="column output">
<h4>Output</h4>
<div class="metrics">
<div class="output-stats ui-percTrainData">
<span>Test loss</span>
<div class="value" id="loss-test"></div>
</div>
<div class="output-stats train">
<span>Training loss</span>
<div class="value" id="loss-train"></div>
</div>
<div id="linechart"></div>
</div>
<div id="heatmap"></div>
<div style="float:left;margin-top:20px">
<div style="display:flex; align-items:center;">
<!-- Gradient color scale -->
<div class="label" style="width:105px; margin-right: 10px">
Colors shows data, neuron and weight values.
</div>
<svg width="150" height="30" id="colormap">
<defs>
<linearGradient id="gradient" x1="0%" y1="100%" x2="100%" y2="100%">
<stop offset="0%" stop-color="#f59322" stop-opacity="1"></stop>
<stop offset="50%" stop-color="#e8eaeb" stop-opacity="1"></stop>
<stop offset="100%" stop-color="#0877bd" stop-opacity="1"></stop>
</linearGradient>
</defs>
<g class="core" transform="translate(3, 0)">
<rect width="144" height="10" style="fill: url('#gradient');"></rect>
</g>
</svg>
</div>
<br/>
<div style="display:flex;">
<label class="ui-showTestData mdl-checkbox mdl-js-checkbox mdl-js-ripple-effect" for="show-test-data">
<input type="checkbox" id="show-test-data" class="mdl-checkbox__input" checked>
<span class="mdl-checkbox__label label">Show test data</span>
</label>
<label class="ui-discretize mdl-checkbox mdl-js-checkbox mdl-js-ripple-effect" for="discretize">
<input type="checkbox" id="discretize" class="mdl-checkbox__input" checked>
<span class="mdl-checkbox__label label">Discretize output</span>
</label>
</div>
</div>
</div>
</div>
<!-- More -->
<div class="more">
<!-- <button class="mdl-button mdl-js-button mdl-button--icon"><i class="material-icons">keyboard_arrow_down</i></button> -->
<button class="mdl-button mdl-js-button mdl-button--fab">
<i class="material-icons">keyboard_arrow_down</i>
</button>
</div>
<!-- Article -->
<article id="article-text">
<div class="l--body">
<h2>Um, What Is a Neural Network?</h2>
<p>It’s a technique for building a computer program that learns from data. It is based very loosely on how we think the human brain works. First, a collection of software “neurons” are created and connected together, allowing them to send messages to each other. Next, the network is asked to solve a problem, which it attempts to do over and over, each time strengthening the connections that lead to success and diminishing those that lead to failure. For a more detailed introduction to neural networks, Michael Nielsen’s <a href="http://neuralnetworksanddeeplearning.com/index.html">Neural Networks and Deep Learning</a> is a good place to start. For a more technical overview, try <a href="http://www.deeplearningbook.org/">Deep Learning</a> by Ian Goodfellow, Yoshua Bengio, and Aaron Courville.</p>
</div>
<div class="l--body">
<h2>This Is Cool, Can I Repurpose It?</h2>
<p>Please do! We’ve open sourced it on <a href="https://github.com/tensorflow/playground">GitHub</a> with the hope that it can make neural networks a little more accessible and easier to learn. You’re free to use it in any way that follows our <a href="https://github.com/tensorflow/playground/blob/master/LICENSE">Apache License</a>. And if you have any suggestions for additions or changes, please <a href="https://github.com/tensorflow/playground/issues">let us know</a>.</p>
<p>We’ve also provided some controls below to enable you tailor the playground to a specific topic or lesson. Just choose which features you’d like to be visible below then save <a class="hide-controls-link" href="#">this link</a>, or <a href="javascript:location.reload();">refresh</a> the page.</p>
<div class="hide-controls"></div>
</div>
<div class="l--body">
<h2>What Do All the Colors Mean?</h2>
<p>Orange and blue are used throughout the visualization in slightly different ways, but in general orange shows negative values while blue shows positive values.</p>
<p>The data points (represented by small circles) are initially colored orange or blue, which correspond to positive one and negative one.</p>
<p>In the hidden layers, the lines are colored by the weights of the connections between neurons. Blue shows a positive weight, which means the network is using that output of the neuron as given. An orange line shows that the network is assiging a negative weight.</p>
<p>In the output layer, the dots are colored orange or blue depending on their original values. The background color shows what the network is predicting for a particular area. The intensity of the color shows how confident that prediction is.</p>
</div>
<div class="l--body">
<h2>What Library Are You Using?</h2>
<p>We wrote a tiny neural network <a href="https://github.com/tensorflow/playground/blob/master/src/nn.ts">library</a>
that meets the demands of this educational visualization. For real-world applications, consider the
<a href="https://www.tensorflow.org/">TensorFlow</a> library.
</p>
</div>
<div class="l--body">
<h2>Credits</h2>
<p>
This was created by Daniel Smilkov and Shan Carter.
This is a continuation of many people’s previous work — most notably Andrej Karpathy’s <a href="http://cs.stanford.edu/people/karpathy/convnetjs/demo/classify2d.html">convnet.js demo</a>
and Chris Olah’s <a href="http://colah.github.io/posts/2014-03-NN-Manifolds-Topology/">articles</a> about neural networks.
Many thanks also to D. Sculley for help with the original idea and to Fernanda Viégas and Martin Wattenberg and the rest of the
<a href="https://research.google.com/bigpicture/">Big Picture</a> and <a href="https://research.google.com/teams/brain/">Google Brain</a> teams for feedback and guidance.
</p>
</div>
</article>
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