Prediction with Neural Networks TensorFlow

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Prediction with Neural Networks TensorFlow

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#1 by (1 votes)

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Hello, I'm having trouble implementing a neural network. My problem is that I can only implement it with an 'X' attribute

I need help in this code for example, how do I put two input attributes? In the case of this code only has the attribute X I wanted to put another attribute that also influences the formula something like: linear_model = W1 * x1 + W2 * x2 + b

How would the code look?

 import tensorflow as tf
    W = tf.Variable([.3], dtype = tf.float32)
    b = tf.Variable([-.3], dtype = tf.float32)
    x = tf.placeholder(tf.float32)
    y = tf.placeholder(tf.float32)
    linear_model = W * x + b
    init = tf.global_variables_initializer()
    sess = tf.Session()
    sess.run(init)

    squared_deltas = tf.square(linear_model - y)
    loss = tf.reduce_sum(squared_deltas)

    # Teste com aprendizado

    optimizer = tf.train.GradientDescentOptimizer(0.01)
    train = optimizer.minimize(loss)
    sess.run(init) #reset values to incorrect defaults
    for i in range(1000):
        sess.run(train, {x: [1, 2, 3, 4], y: [0, -1, -2, -3]})

    print(sess.run([W, b]))

python redes-neurais tensorflow

asked by anonymous 21.08.2017 / 23:14

1 answer

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score 1 · Answer 1

All data entry in TensorFlow is done with placeholder . Just add another placeholder field

import tensorflow as tf

W1 = tf.Variable([.3], dtype = tf.float32)
b = tf.Variable([-.3], dtype = tf.float32)
x1 = tf.placeholder(tf.float32)

W2 = tf.Variable([.3], dtype = tf.float32)
x2 = tf.placeholder(tf.float32)

y = tf.placeholder(tf.float32)
linear_model = W1 * x1 + W2 * x2 + b

init = tf.global_variables_initializer()
sess = tf.Session()
sess.run(init)

squared_deltas = tf.square(linear_model - y)
loss = tf.reduce_sum(squared_deltas)

# Teste com aprendizado

optimizer = tf.train.GradientDescentOptimizer(0.01)
train = optimizer.minimize(loss)
sess.run(init) #reset values to incorrect defaults
for i in range(1000):
    dict = {
        x1: [1, 2, 3, 4],
        x2: [5, 6, 7, 8],
        y: [0, -1, -2, -3]

    }
    sess.run(train, dict)

print(sess.run([W1, b]))