31:[] 2f:{"title":"Quick sentiment analysis with TensorFlow","cells":[{"id":0,"value":"md`# Quick sentiment analysis with TensorFlow\n\nBased on [TensorFlow’s example](https://github.com/tensorflow/tfjs-examples/tree/master/sentiment), this is a simple demo of determining positive/negative sentiment with tensorflow. Use the text box below to test it out.`","pinned":false,"hidden":false,"mode":"ojs"},{"id":29,"value":"viewof inputText = html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":102,"value":"{\n const dim = 100;\n const context = DOM.context2d(dim, dim);\n const radius = dim / 2;\n var arc = d3\n .arc()\n .outerRadius(radius - 1)\n .innerRadius(radius - 34)\n .padAngle(0.1)\n .context(context);\n\n var pie = d3.pie();\n\n var arcs = pie([sentiment, 1 - sentiment]);\n\n context.translate(dim / 2, dim / 2);\n let colors = [\"lightgreen\", \"salmon\"];\n\n context.globalAlpha = 0.5;\n arcs.forEach(function(d, i) {\n context.beginPath();\n arc(d);\n context.fillStyle = colors[i];\n context.fill();\n });\n\n context.globalAlpha = 1;\n context.beginPath();\n arcs.forEach(arc);\n context.lineWidth = 1.5;\n context.stroke();\n\n return html`

${\n context.canvas\n }

\nPositive
\nNegative\n

`;\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":37,"value":"sentiment = {\n const predictOut = model.predict(inputTensor);\n const score = predictOut.dataSync()[0];\n predictOut.dispose();\n return score;\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":24,"value":"inputTensor = {\n const inputBuffer = tf.buffer([1, metadata.max_len], \"float32\");\n for (let i = 0; i < inputText.length; ++i) {\n const word = inputText[i];\n inputBuffer.set(metadata.word_index[word] + metadata.index_from, 0, i);\n }\n const input = inputBuffer.toTensor();\n return input;\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":14,"value":"model = await tf.loadModel(\n \"https://storage.googleapis.com/tfjs-models/tfjs/sentiment_cnn_v1/model.json\"\n)","pinned":true,"hidden":false,"mode":"ojs"},{"id":8,"value":"metadata = (await fetch(\n \"https://storage.googleapis.com/tfjs-models/tfjs/sentiment_cnn_v1/metadata.json\"\n)).json()","pinned":true,"hidden":false,"mode":"ojs"},{"id":3,"value":"tf = require(\"@tensorflow/tfjs@0.10.0\")","pinned":true,"hidden":false,"mode":"ojs"},{"id":100,"value":"d3 = require('d3@5')","pinned":true,"hidden":false,"mode":"ojs"}],"files":"$W31","stdlib":"1","titling":"auto"}