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tensorflow.jsAdvent Calendar 2019

Day 4

plunkerでtensorflow.js その18

Last updated at Posted at 2019-11-05

#概要

plunkerでtensorflow.jsやってみた。
lstm使ってみた。
xor、学習させてみた。

#サンプルコード


tf.setBackend('cpu');
const model = tf.sequential();
model.add(tf.layers.lstm({
    units: 8,
    returnSequences: false,
    inputShape: [2, 1]
}));
model.add(tf.layers.dense({
    units: 1,
    activation: 'sigmoid'
}));
model.compile({
    optimizer: 'adam',
    loss: 'binaryCrossentropy'
});
const xs = tf.tensor3d([[[1], [0]], [[0], [1]], [[1], [1]], [[0], [0]]]);
const ys = tf.tensor2d([[1], [1], [0], [0]]);
model.fit(xs, ys, {
    batchSize: 4, 
    epochs: 1000
}).then((d) => {
    var str = "loss = ";
    str += d.history.loss[0]; 
    str += "<br>1, 1 = ";
    var pre0 = model.predict(tf.tensor3d([[[1], [1]]]));
    str += pre0.dataSync() + "<br>0, 0 = ";
    var pre1 = model.predict(tf.tensor3d([[[0], [0]]]));
    str += pre1.dataSync() + "<br>0, 1 = ";
    var pre2 = model.predict(tf.tensor3d([[[0], [1]]]));
    str += pre2.dataSync() + "<br>1, 0 = ";
    var pre3 = model.predict(tf.tensor3d([[[1], [0]]]));
    str += pre3.dataSync() + "<br>";
    document.write(str);
});

#成果物

#比較用
tanh
https://embed.plnkr.co/xTaxEW41fcrjvWcxKDxL/

以上。

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