Created
October 21, 2020 10:09
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Can RNN learn that the length of input sequence is even or odd number?
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import tensorflow as tf | |
import random | |
def genSequence(): | |
len = 101 | |
X = [] | |
for i in range(1, len): | |
X.append([[random.random()]]*i) | |
y = [] | |
for i in range(1, len): | |
if i % 2 == 0: | |
y.append(1) | |
else: | |
y.append(0) | |
return (X, y) | |
if __name__ == "__main__": | |
X, y = genSequence() | |
XTensor = tf.ragged.constant(X, dtype=tf.float32) | |
yTensor = tf.ragged.constant(y, dtype=tf.float32) | |
print(XTensor) | |
print(yTensor) | |
# Build the Keras model. | |
keras_model = tf.keras.Sequential([ | |
tf.keras.layers.Input(shape=(None, 1), dtype=tf.float32, ragged=True), | |
tf.keras.layers.LSTM(32, use_bias=True), | |
tf.keras.layers.Dense(1) | |
]) | |
keras_model.summary() | |
keras_model.compile(loss='MSE', optimizer=tf.keras.optimizers.Adam(0.001)) | |
keras_model.fit(XTensor, yTensor, epochs=200) | |
print(keras_model.predict(tf.constant([[[1]]]))) | |
print(keras_model.predict(tf.constant([[[1]]*2]))) | |
print(keras_model.predict(tf.constant([[[1]]*50]))) | |
print(keras_model.predict(tf.constant([[[1]]*51]))) | |
print(keras_model.predict(tf.constant([[[1]]*150]))) | |
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