Created
April 3, 2019 23:26
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To convert from Celsius to Fahrenheit
using Tensorflow
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import tensorflow as tf | |
import numpy as np | |
#create numpy array and initialize with values | |
celsius_q = np.array([-40, -10, 0, 8, 15, 22, 38], dtype=float) | |
fahrenheit_a = np.array([-40, 14, 32, 46, 59, 72, 100], dtype=float) | |
#looping through the celcius input array | |
for i, c in enumerate(celsius_q): | |
print("{} degrees Celsius = {} degrees Fahrenheit".format(c, fahrenheit_a[i])) | |
#bulidng a layer l0 | |
# input_shape=[1] — | |
# This specifies that the input to this layer is a single value. | |
# That is, the shape is a one-dimensional array with one member. | |
# Since this is the first (and only) layer, that input shape is the | |
# input shape of the entire model. The single value is a floating point number, representing degrees Celsius. | |
# | |
# units=1 — This specifies the number of neurons in the layer. | |
# The number of neurons defines how many internal variables the layer | |
# has to try to learn how to solve the problem (more later) | |
l0 = tf.keras.layers.Dense(units=1, input_shape=[1]) | |
#assemble layers into the model | |
model = tf.keras.Sequential([l0]) | |
#compile the model | |
model.compile(loss='mean_squared_error', optimizer=tf.keras.optimizers.Adam(0.1)) | |
#train the model | |
history = model.fit(celsius_q, fahrenheit_a, epochs=500, verbose=False) | |
print("Finished training the model") | |
#use the trained model to predict | |
print(model.predict([100])) | |
#looking at the layer weights | |
print("These are the layer variables: {}".format(l0.get_weights())) |
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